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Chinese girl under a glazed archway at the Confucius Temple Imperial College, built in 1306 by the grandson of Kublai Khan, administering the official Confucian examination system, Beijing, China, Asia
Confucius Temple and Imperial College built in 1306 by the grandson of Kublai Khan and administered the official Confucian examination system, Beijing, China, Asia
Raufarholsheillir lava tube cave system, Iceland, Polar Regions
Harder Kulm train, Interlaken, Bernese Oberland, Switzerland
Train of cogwheel railway at Schynige Platte, Jungfrau Region, Bernese Oberland, Switzerland
Sheffield trams (Supertram) approaching a stop in Church Street, Cathedral Quarter, Sheffield, Yorkshire, England
Sheffield tram (Supertram) on overhead track approaching Commercial Street from Park Square, Sheaf Valley Quarter, Sheffield, Yorkshire, England
Sheffield Railway station seen from the east with Supertram stop in foreground and city centre behind, Granville Street, Sheffield, Yorkshire, England
Cham people using a Dai fishing system for trei real fish on the Tonle Sap River, Cambodia, Indochina, Southeast Asia, Asia
Cham people using a Dai fishing system for trei real fish on the Tonle Sap River, Cambodia, Indochina, Southeast Asia, Asia
Tram, the main transport system in Budapest, Hungary, Europe
Historic traditional water wheel irrigation system, Betancuria, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Heliostats reflect sunrays to receiver tower, solar energy scientific research centre, AORA Tulip System, Tabernas, Almeria, Andalusia, Spain, Europe
Heliostats reflecting sun rays, solar energy scientific research centre, AORA Tulip System, Tabernas, Almeria, Andalusia, Spain, Europe
Clouds at sunset, Pangalanes Lakes canal system, Tamatave, Madagascar, Africa
Clouds at sunset, Pangalanes Lakes canal system, Tamatave, Madagascar, Africa
Array of solar panels on a bright sunny day, Sierra Alhamilla, near Nijar, Almeria, Andalusia, Spain, Europe
Historic communal well, El Pozo de los Frailes, Cabo de Gata Natural Park, Nijar, Almeria, Andalusia, Spain, Europe
The queen of roads of the old Roman Road system was the Appian Way linking Rome to the south of Italy, Rome, Lazio, Italy, Europe
An El train on the Elevated train system crossing Wells Street Bridge, Chicago, Illinois, United States of America, North America
Mid-Levels Escalators, the longest outdoor covered escalator system in the world at 800 metres, linking the Mid-Levels with Central, Hong Kong Island, Hong Kong, China, Asia
An El train on the Elevated train system crossing Wells Street Bridge, Chicago, Illinois, United States of America, North America
Historic traditional water wheel irrigation system, Betancuria, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Hong Kong's public tranist system Mass Transit Railway (MTR), Kowloon, Hong Kong, China, Asia
Electric powered modern trolley bus public transport rapid transit system, Centro Historico, Mexico City, Mexico, North America
MTR sign, Hong Kong's mass transit railway system, Hong Kong, China, Asia
Metra rail system, station sign in the style of the Paris Metro, Chicago, Illinois, United States of America, North America
Metra rail system, station sign in the style of the Paris Metro, Chicago, Illinois, United States of America, North America
Tram system in Birmingham which runs from Birmingham to Wolverhampton, Birmingham, England, United Kingdom, Europe
Tram, the main transport system in Budapest, Hungary, Europe
Cave system in the Virunga National Park, Rwanda, Africa
Cave system in the Virunga National Park, Rwanda, Africa
Skyline and Dubai Metro, Modern Elevated Metro system, opened in 2010, Dubai, United Arab Emirates, Middle East
Hong Kong's public tranist system Mass Transit Railway (MTR), Kowloon, Hong Kong, China, Asia
An El train on the Elevated train system, Chicago, Illinois, United States of America, North America
Tram system in Birmingham which runs from Birmingham to Wolverhampton, Birmingham, England, United Kingdom, Europe
Foggy Bottom Metro station platform, part of the Washington D.C. metro system, Washington D.C., United States of America, North America
Hornsund, a fjord system on the western coast of Spitsbergen, Svalbard Archipelago, Arctic, Norway, Europe
The site of the Commandants House showing supports for suspended floor system with hot air to heat rooms above, dating from AD138, Cilurnum (Chesters Roman Fort), Hadrian's Wall, UNESCO World Heritage Site, Chollerford, Northumbria National Park, England, United Kingdom, Europe
Hornsund, a fjord system on the western coast of Spitsbergen, Svalbard Archipelago, Arctic, Norway, Europe
Modern road system leading to the Commercial Centre, Tel Aviv, Israel, Middle East
U-Bahn Metro System, Nuremberg, Bavaria, Germany, Europe
The Light Rail Transit system with the skyline of the city of Kuala Lumpur behind, Malaysia, Southeast Asia, Asia
POV on the modern driverless Dubai elevated Rail Metro System, running alongside the Sheikh Zayed Road, Dubai, United Arab Emirates, Middle East
Hong Kong mass transit railway system (MTR), Hong Kong, China, Asia
Steam emitted from the New York Steam System, dating back to 1882 providing steam to heat, cool or disinfect around 1,700 buildings, New York, United States of America, North America
Steam emitted from the New York Steam System, dating back to 1882 providing steam to heat, cool or disinfect around 1,700 buildings, New York, United States of America, North America (Excess steam is vented from orange and white funnels known as stacks.)
Steam emitted from the New York Steam System, dating back to 1882 providing steam to heat, cool or disinfect around 1,700 buildings, New York, United States of America, North America
Aerial vertical drone perspective of the Baixa district with its iconic grid system leading to the Commerce Square and Tagus River, Lisbon, Portugal, Europe
A technical cave diver using a diver propulsion vehicle (DPV) to dive into the Blue Springs state park cave system near Marianna, Florida.
Technical diver in cave system, Mexico.
Diver enters the cavern system at Chac Mool cenote in the Riviera Maya area of Mexico's Yucatan Peninsula.
A cavern diver ascends into the light filtering into cenote system at Yucatan Peninsula, Mexico.
Two scuba divers in the Garden of Eden cavern part of the cenote system on the Yucatan Peninsula of Mexico.
A cavern diver enters the Taj Mahal cenote system on Mexico's Yucatan Peninsula.
Cavern divers enter cenote system in Mexico's Yucatan Peninsula.
Scuba diver in the Garden of Eden cavern part of the cenote system on the Yucatan Peninsula of Mexico.
Llanfair Light Railway, Llanfair Caereinion, Welshpool, Powis, Wales, United Kingdom
The Coconino Overlook along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America
The interior of the Supai Tunnel along the North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America
View of Japanese rickshaw (jinrikisha) in busy street scene, Asakusa, Taito City, Tokyo, Honshu, Japan
The iron ore mine Cockerill d'Esch-sur-Alzette played a major role in economic boom from the 1870s to the 1990s, Luxembourg
View of vintage tram and colourful buildings in the Alfama District on a sunny day, Lisbon, Portugal, Europe
View of Campo Pequeno Metro Station interior, Lisbon, Portugal, Europe
View of vintage yellow No28 tram on a sunny day in the Alfama District, Lisbon, Portugal, Europe
View of vintage Gloria Funicular at dusk, hilltop tram ride, Lisbon, Portugal, Europe
Canoe net fishermen on Mono River mouth in Grand-Popo area, Benin,Gulf of Guinea,West Africa
Postojna Caves, Postojna, Slovenia, Eastern Europe
Postojna Caves, Postojna, Slovenia, Eastern Europe
Aerial of Sewell Mining Town, UNESCO World Heritage Site, Chile, South America
Elevated view of traffic and tram on major street during daytime, Hondori, Naka Ward, Hiroshima, Honshu, Japan
Elevated view of traffic and tram on major street during daytime, Hondori, Naka Ward, Hiroshima, Honshu, Japan
Metro railway on St-Martin bridge under the Bessieres bridge with Cathedral of Notre Dame in background, Lausanne, Canton of Vaud, Switzerland
Irrigation canal in palm grove. Birkat Al Mouz, Al Dakhliya region, Falaj irrigation system (Falaj Al-Khatmeen), UNESCO, Oman, Arabian Peninsula
Maasai beadwork at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai man at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai woman at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai beadwork at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai women at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai beadwork at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai beadwork at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Cenote Oxman, Valladolid, Yucatan State, Mexico
Penfold Design Postbox in Buxton, United Kingdom
Bicycles for rent under the Citi Bike system which provides 33000 bikes for rent at 1900 stations, New York City, United States of America, North America
Green tram and Nam Tin building, North Point, Hong Kong, China
A vibrant view of Tokyo skyline featuring train tracks weaving through modern skyscrapers in a busy district, Tokyo, Honshu, Japan
A vertical shot of a Hong Kong Tram passing the colonial Old Supreme Court building, Hong Kong, China
A funicular railway car in a station, Naples, Campania, Italy
Underwater view of of the reef system at Half Moon Caye, UNESCO, Mesoamerican Barrier Reef, Belize
Local transport on the Sangha River, Ouesso, Republic of Congo
Johns Hopkins Glacier, Glacier Bay National Park in Southeast Alaska, United States of America
Centuries Old Cannon Artillery, Castle of the Three Kings of Morro, UNESCO, Havana, Cuba
View of electricity plant powered by wind power turbines in Maldonado department, Uruguay
Trans-Alaska Pipeline System, Fairbanks, Alaska, United States of America, North America
Trans-Alaska Pipeline System, Fairbanks, Alaska, United States of America, North America
View towards the Central Tramway Company cliff railway, Scarborough, North Yorkshire, England, United Kingdom
Water system on top of Assekrem, Tamanrasset, Hoggar mountains, Algeria, North Africa, Africa
Green Naga hills stretching into the distance, scarred by brown scorched hill after slash and burn system has occurred, Nagaland, India, Asia
A subway station showing a train and commuter platform on the Metro de Santiago rapid transit system station, Santiago, Chile, South America
Colourful boats on the Aztec canal system, UNESCO World Heritage Site, Xochimilco, Mexico City, Mexico, North America