Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Breakfast at Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

Climbers ascending Aconcagua, 6961 metres, the highest mountain in the Americas and one of the Seven Summits, Andes, Argentina, South America

Rydal Water, 2 km long and over 15 metres deep, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Alila Jabal Akhdar hotel, nestled 2000 metres above sea level, surrounded by Al Hajar Mountains, Sultanate of Oman, Arabian Peninsula

The 53 metre bell tower of the 13th century church in this historic town and famous Bordeaux red wine region, Saint Emilion, Gironde, France, Europe

Mountain landscape at 5000 metres, high Khumbu, Himalayas, Nepal, Asia

Old cannon, Skala of the Kasbah a mighty crenellated bastion, 300 metres in length, built on the cliffs to protect the city on its seaward side, Essaouira, historic city of Mogador, Morocco, North Africa, Africa

Xativa castle at dusk, at a height of 310 metres above the modern-day city, Xativa, Valencia, Spain, Europe

Elevated view of businessmen inside the Shinjuku NS Building, the interior is hollow with a 1600sq metre atrium illuminated through a glass roof, Shinjuku, Tokyo, Honshu, Japan, Asia

The Langkawi Sky Bridge, a 125 metre curved footbridge high above the rainforest canopy, Langkawi, Malaysia, Southeast Asia, Asia

Xativa castle at dusk, at a height of 310 metres above the modern-day city, Xativa, Valencia, Spain, Europe

The 65 metre long reclining Buddha statue at The Chauk Htat Gyi Pagoda, showing the symbols on the soles of the feet, Yangon (Rangoon), Myanmar (Burma), Asia

Temperature inversion on Aconcagua, 6961 metres, the highest mountain in the Americas and one of the Seven Summits, Andes, Argentina, South America

Taktsang Palphug Monastery, (Tiger's Nest monastery), a sacred Buddhist site built in 1692 and clinging to rock at 3120 metres, Bhutan, Himalayas, Asia

Climber approaching Aconcagua, 6961 metres, the highest mountain in the Americas, Andes, Argentina, South America

Rural landscape of Magura village, 1000 metres up in the mountains, in the Piatra Craiului National Park, Romania, Europe

Xativa castle at dusk, at a height of 310 metres above the modern-day city, Xativa, Valencia, Spain, Europe

Taktsang Palphug Monastery (Tiger's Nest monastery), a prominent sacred Buddhist site clinging to rock at 3120 metres, Bhutan, Himalayas, Asia

Climbers approaching Aconcagua, 6961 metres, the highest mountain in the Americas and one of the Seven Summits, Andes, Argentina, South America

Rydal Water, 2 km long and over 15 metres deep, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

One of the many 100 metre deep subway stations on the Pyongyang subway network, Pyongyang, Democratic People's Republic of Korea (DPRK), North Korea, Asia

Climbers approaching Aconcagua, 6961 metres, the highest mountain in the Americas, Andes, Argentina, South America

Punhung station, one of the many 100 metre deep subway stations on the Pyongyang subway network, Pyongyang, Democratic People's Republic of Korea (DPRK), North Korea, Asia

Landscape after a snow storm on Aconcagua, 6961 metres, the highest mountain in the Americas and one of the Seven Summits, Andes, Argentina, South America

Landscape after a snow storm on Aconcagua, 6961 metres, the highest mountain in the Americas and one of the Seven Summits, Andes, Argentina, South America

Old cannons, Skala of the Kasbah a mighty crenellated bastion, 300 metres in length, built on the cliffs to protect the city on its seaward side, Essaouira, historic city of Mogador, Morocco, North Africa, Africa

A giant groundsel growing at 4000 metres elevation under the Barranco Wall of Mount Kilimanjaro, Tanzania, East Africa, Africa

Mingun Pahtodawgyi, an incomplete 50 metre high brick construction stupa begun in 1790, damaged in 1839 earthquake, Mingun, Myanmar (Burma), Asia

Aconcagua, 6961 metres, the highest mountain in the Americas and one of the Seven Summits, Andes, Argentina, South America

Aconcagua, 6961 metres, the highest mountain in the Americas and one of the Seven Summits, Andes, Argentina, South America

Aconcagua, 6961 metres, the highest mountain in the Americas, Andes, Argentina, South America

Punhung station, one of the many 100 metre deep subway stations on the Pyongyang subway network, Pyongyang, Democratic People's Republic of Korea (DPRK), North Korea, Asia

An aerial view of The Shard, standing at 309.6 metres high, the tallest buliding in Europe, London, England, United Kingdom, Europe

Lake Sils, between Maloja Pass and Lake Silvaplana, overlooked by several mountains over 3000 metres, Graubunden, Switzerland, Europe

Feet of the Reclining Buddha, built in 1991, 101 metres long, Monywa Township, Sagaing Division, Myanmar (Burma), Asia

Elizabeth Quay Bridge, a 20 metre high suspension bridge, Perth City, Western Australia, Australia, Pacific

The Goteik viaduct, constructed in 1899, 689 metres long and approximately 250 metres high, Nawnghkio, Shan state, Myanmar (Burma), Asia

Rural landscape of Magura village, 1000 metres up in the mountains, in the Piatra Craiului National Park, Romania, Europe

Europe's largest building site of 68000 square metres, at the Potsdama Platz in the city of Berlin, Germany, Europe

Lay Kyun Sakkya Standing Buddha, built between 1995 and 2008, standing 129 metres high with 31 floors, Monywa township, Sagaing Division, Myanmar (Burma), Asia

The 65 metre tall Minaret of Jam, built by Sultan Ghiyat Ud-Din Muhammad ben San, in around 1190, with Kufic script and verses of the Koran on the exterior, UNESCO World Heritage Site, Ghor Province, Afghanistan, Asia

Cardones growing in the desert at 3000 metres, near Alfarcito, Jujuy, Argentina, South America

600 metre zip line at the top of the Sky Tram at Arenal Volcano, Costa Rica, Central America

Mount Teide (Pico del Teide) at 3718 metres, cable car and viewing platform, Parque Nacional de Las Canadas del Teide (Teide National Park), Tenerife, Canary Islands, Spain, Europe

Five storey Nyatapola Temple, at 30 metres the highest in the Kathmandu valley, Taumadhi Square, Bhaktapur, Nepal, Asia

Five storey Nyatapola Temple, at 30 metres the highest in the Kathmandu valley, Taumadhi Square, Bhaktapur, Nepal, Asia

Depth sign shows 175 metres, the proposed water level when Three Gorges dam project is completed, China

Depth sign shows 175 metres, the proposed water level when Three Gorges dam project is completed, China

Mount Teide (Pico del Teide) at 3718 metres, cable car, Parque Nacional de Las Canadas del Teide (Teide National Park), Tenerife, Canary Islands, Spain, Europe

Detail from the Citadelle Fort, built in 1817 by Henri Christophe, the walls are four metres thick, Milot, Haiti, West Indies, Caribbean, Central America

Approach to the Citadelle Fort, built in 1817 by Henri Christophe, the walls are four metres thick, Milot, Haiti, West Indies, Caribbean, Central America

View down to the sea from the platform at Cabo Girao, the second highest cliff in the world at 589 metres, Madeira, Portugal, Atlantic, Europe

A shoebox-sized hotel room less than two metres wide and costing 8,000 Yen ($80.00) in central Tokyo, Japan, Asia

Baldwin Street, the world's steepest residential road with an average gradient of 1 in 5 and 350 metres long, Dunedin, Otago, South Island, New Zealand, Pacific

The 65 metre tall 12th century Minaret of Jam at dawn, UNESCO World Heritage Site, Ghor (Ghur, Ghowr) Province, Afghanistan, Asia

Sunset at Mount Everest (Mount Sagarmatha), Zhumulangma Peak, the world's highest mountain, 8,848 metres above sea level, Tibet, China, Asia

The 38 metre Majestic Kawanua II aluminium fast ferry departing the capital to the distant northern island of Siau, Manado, North Sulawesi, Indonesia, Southeast Asia, Asia

Iron pillar weighing six tons, seven metres high, Qutab Minar, Delhi, India, Asia

Tourists at Baldwin Street, the world's steepest residential road with an average gradient of 1 in 5 and 350 metres long, Dunedin, Otago, South Island, New Zealand, Pacific

Farmhouse and barn at Klosters - Amongst the Silvretta group of the Swiss Alps. Road to Silvretta.Mountain at right is P.Linard 3411 metres high

One thousand year old plane tree, trunk has circumference of 14 metres, Isagarada, Pelion, Greece, Europe

Burj Khalifa, the tallest man made structure in the world at 828 metres, Downtown Dubai, Dubai, United Arab Emirates, Middle East

Klosters - Amongst the Silvretta group of the Swiss Alps. Road to Silvretta.Mountain at right is P.Linard 3411 metres high

Snow covered barns in the meadows below the Alps at Klosters - Amongst the Silvretta group of the Swiss Alps. Road to Silvretta.Mountain at right is P.Linard 3411 metres high

Vein mine 300 metres deep, Mogok ruby mines, near Mandalay, Myanmar (Burma), Asia

Burj Khalifa, the tallest man made structure in the world at 828 metres, and Dubai Mall, Downtown Dubai, Dubai, United Arab Emirates, Middle East

Snow covered barns in the meadows below the Alps at Klosters - Amongst the Silvretta group of the Swiss Alps. Road to Silvretta.Mountain at right is P.Linard 3411 metres high

Tower Lombardy, 83 metres high, and the market in Piazza della Erbe, Verona, Veneto, Italy, Europe

Man riding his home home at Klosters - Amongst the Silvretta group of the Swiss Alps. Road to Silvretta.Mountain at right is P.Linard 3411 metres high

Burj Khalifa, the tallest building in the World at 828 metres, Dubai, United Arab Emirates, Middle East

The Maletsunyane Falls, the highest waterfall in Southern Africa with a single drop of 192 metres, central highlands, Lesotho, Africa

Trekkers at Annapurna Base Camp at 4130 metres looking towards Machapuchare, Annapurna Sanctuary, Himalayas, Nepal, Asia

Cascade d'Antomboka, an 82-metre waterfall in Montagne d'Ambre National Park in northern Madagascar, Madagascar, Africa

Humpback Whales (Megaptera novaeangliae) feeding on Krill in Wilhelmena Bay, Antarctic Peninsular and surfacing wth a metre of a zodiak. The whales migrate here in the summer to feed on the Krill. Krill numbers have declined by over 50%. They feed on algae that grows on the underside of sea ice, As the sea ice melts, both algae and krill decline. This shot has penguins resting on an iceberg in the background.

The Mer De Glace which has thinned 150 meters since 1820, and retreated by 2300 Metres, with a balcony cafe overlooking the rapidly shrinking glacier.

The Remains of the Godwin battery on the beach at Kilnsea at the head of Spurn point on Yorkshires East Coast, UK. Initially constructed during the First World War, the Godwin Battery was added to during the Second World War. It comprised of gun emplacements, search light, barracks, officers’ mess, and a hospital. This section of coastline is the fastest eroding coastline in Europe. The soft boulder clay cliffs are easily eroded and have been eroding since Roman Times, but recently the climate change impacts of increased stormy weather, increased heavy rainfall events and sea level rise have accelerated the rate of erosion. The average rate of attrition is 1.5metres per year, last year it was 5 metres.

The Remains of the Godwin battery on the beach at Kilnsea at the head of Spurn point on Yorkshires East Coast, UK. Initially constructed during the First World War, the Godwin Battery was added to during the Second World War. It comprised of gun emplacements, search light, barracks, officers’ mess, and a hospital. This section of coastline is the fastest eroding coastline in Europe. The soft boulder clay cliffs are easily eroded and have been eroding since Roman Times, but recently the climate change impacts of increased stormy weather, increased heavy rainfall events and sea level rise have accelerated the rate of erosion. The average rate of attrition is 1.5metres per year, last year it was 5 metres.

England's tallest tree, a Grand Fir (Abies grandis), champion of the Tree Register, 57.8 metres (190 feet) tall, planted aound 1860 in an arboretum at the Wansfell Holme Country Estate (Skelghyll Woods), Ambleside, Lake District, Cumbria, England, United Kingdom, Europe

Looking up inside the 65 metre tall 12th Century Minaret of Jam, UNESCO World Heritage Site, Ghor (Ghur) (Ghowr) Province, Afghanistan, Asia

Statue of Guanyin (Goddess of Mercy), at 22 metres the largest wooden statue in the world, Temple of Universal Peace dating from 1755, UNESCO World Heritage Site, Chengde, Hebei Province, China, Asia

A memorial to Mario Merelli, an Italian climber killed on Annapurna, at Annapurna Base Camp at 4130 metres, Annapurna Sanctuary, Himalayas, Nepal, Asia

Statue of Guanyin (Goddess of Mercy), at 22 metres the largest wooden statue in the world, Temple of Universal Peace dating from 1755, UNESCO World Heritage Site, Chengde, Hebei Province, China, Asia

Reclining Buddha 42 metres long, Wat Lokaya Sutharam, Ayutthaya, UNESCO World Heritage Site, Thailand, Southeast Asia, Asia

England's tallest tree, a Grand Fir (Abies grandis), champion of the Tree Register, 57.8 metres (190 feet) tall, planted aound 1860 in an arboretum at the Wansfell Holme Country Estate (Skelghyll Woods), Ambleside, Lake District, Cumbria, England, United Kingdom, Europe

Prayer flags at Annapurna Base Camp at 4130 metres in front of Annapurna South summit, Annapurna Sanctuary, Himalayas, Nepal, Asia

A rapidly retreating glacier on the side of the 6428 metre peak of Gandharwa Chuli in the Annapurna Sanctuary, Nepalese Himalayas, Nepal, Asia

Burundi woman and her sons collecting water from a public stand pipe which is situated 300 metres from her house. Gitera.

Trekkers at Annapurna base camp at 4130 metres looking towards Annapurna South, Annapurna Sanctuary, Himalayas, Nepal, Asia

Prayer flags at Annapurna Base Camp at 4130 metres looking towards Machapuchare, Annapurna Sanctuary, Himalayas, Nepal, Asia

Old cannons, Skala of the Kasbah a mighty crenellated bastion, 300 metres in length, built on the cliffs to protect the city on its seaward side, Essaouira, historic city of Mogador, Morocco, North Africa, Africa