The Chain Bridge over the River Danube, UNESCO World Heritage Site, Budapest, Hungary, Europe

Sitting on the banks of the River Danube, the Hungarian Parliament Building dates from the late 19th century, UNESCO World Heritage Site, Budapest, Hungary, Europe

Sitting on the banks of the River Danube, the Hungarian Parliament Building dates from the late 19th century, UNESCO World Heritage Site, Budapest, Hungary, Europe

Buda Castle, the historic seat of the Hungarian kings in Budapest, dating from the 18th century, UNESCO World Heritage Site, Budapest, Hungary, Europe

The Hungarian Parliament Building and Chain Bridge over the River Danube, UNESCO World Heritage Site, Budapest, Hungary, Europe

Sitting on the banks of the River Danube, the Hungarian Parliament Building in Budapest dates from the late 19th century, UNESCO World Heritage Site, Budapest, Hungary, Europe

The city of Budapest and River Danube, UNESCO World Heritage Site, Budapest, Hungary, Europe

The Hungarian Parliament Building and Chain Bridge over the River Danube, UNESCO World Heritage Site, Budapest, Hungary, Europe

Buda Castle dating from the 18th century, the historic seat of the Hungarian kings, UNESCO World Heritage Site, Budapest, Hungary, Europe

Cathedral Rocks reflected in floodpools, Yosemite Valley, UNESCO World Heritage Site, California, United States of America, North America

View of 16th century houses of Hallstatt, UNESCO World Heritage Site, on shore of Lake Hallstattersee, in Salzkammergut region, Austria, Europe

Windermere, Ambleside, morning light, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Cathedral of Sevilla, UNESCO World Heritage Site, Seville, Andalusia, Spain, Europe

Decorated archways and columns of the Mezquita-Catedral (Great Mosque of Cordoba), UNESCO World Heritage Site, Cordoba, Andalusia, Spain, Europe

Exterior of Saint Mary's Basilica (Bazylika Mariacka) in Market Square (Rynek Glowny) at night, UNESCO World Heritage Site, Krakow, Malopolskie, Poland, Europe

Exterior of Saint Mary's Basilica (Bazylika Mariacka) in Market Square (Rynek Glowny) at night, UNESCO World Heritage Site, Krakow, Malopolskie, Poland, Europe

Interior of Saint Mary's Basilica (Bazylika Mariacka), UNESCO World Heritage Site, Krakow, Malopolskie, Poland, Europe

Rynek Glowny (Market Square) at dusk, UNESCO World Heritage Site, Krakow, Malopolskie, Poland, Europe

Castle of the Teutonic Order in Malbork, UNESCO World Heritage Site, Pomeranian Voivodeship, Poland, Europe

Northside Iwan, Masjed-e Djame (Jameh Mosque), UNESCO World Heritage Site, Esfahan, Iran, Middle East

Frescoes, Transfiguration Cathedral, Spassky Monastery, UNESCO World Heritage Site, Yaroslavl, Golden Ring, Yaroslavl Oblast, Russia, Europe

Evening, Overview, The Holy Trinity St. Sergius Lavra, UNESCO World Heritage Site, Sergiev Posad, Golden Ring, Moscow Oblast, Russia, Europe

Red Ironbridge bridge over River Severn, Ironbridge Gorge, UNESCO World Heritage Site, Ironbridge, Shropshire, England, United Kingdom, Europe

Red Ironbridge bridge over River Severn, Ironbridge Gorge, UNESCO World Heritage Site, Ironbridge, Shropshire, England, United Kingdom, Europe

Red Ironbridge bridge over River Severn, Ironbridge Gorge, UNESCO World Heritage Site, Ironbridge, Shropshire, England, United Kingdom, Europe

Stonehenge Neolithic stone circle, UNESCO World Heritage Site, Salisbury Plain, Wiltshire, England, United Kingdom, Europe

Red Ironbridge bridge over River Severn, Ironbridge Gorge, UNESCO World Heritage Site, Ironbridge, Shropshire, England, United Kingdom, Europe

Archaeological Site of Olympia, UNESCO World Heritage Site, an ancient site on Greece's Peloponnese peninsula, Greece, Europe

Archaeological Site of Olympia, UNESCO World Heritage Site, an ancient site on Greece's Peloponnese peninsula, Greece, Europe

View of cruise ship and Chapel of Our Lady of Salvation overlooking the Old Town, UNESCO World Heritage Site, Kotor, Montenegro, Europe

Carlsbad Caverns, The Big Room, UNESCO World Heritage Site, Carlsbad, New Mexico, United States of America, North America

Christmas markets in Prague's Old Town Square, UNESCO World Heritage Site, Prague, Czech Republic, Europe

Humor Monastery, 1530, UNESCO World Heritage Site, Manastirea Humorului, Suceava County, Romania, Europe

External Frescoes, Humor Monastery, 1530, UNESCO World Heritage Site, Manastirea Humorului, Suceava County, Romania, Europe

Porch of Caryatids, Erechtheion Temple, Acropolis, UNESCO World Heritage Site, Athens, Greece, Europe

Acropolis of Athens, UNESCO World Heritage Site, Athens, Greece, Europe

Tlacotalpan, UNESCO World Heritage Site, Veracruz, Mexico, North America

Christmas tree in Town Hall Square, UNESCO World Heritage Site, Riga, Latvia, Europe

Christmas market in Livu Square, Old Town, UNESCO World Heritage Site, Riga, Latvia, Europe

Albert Dock, Liverpool, Merseyside, England, United Kingdom, Europe

Cedar-Strip Canoe at Lake Louise, Banff National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Cedar-Strip Canoe at Lake Louise, Banff National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Aerial view of Burano Island with Torcello Island in the background, Venice Lagoon, UNESCO World Heritage Site, Veneto, Italy, Europe

Aerial view of Burano Island, Venice Lagoon, UNESCO World Heritage Site, Veneto, Italy, Europe

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Royal Gate, Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Diwan-i-Aam audience hall, Red Fort, UNESCO World Heritage Site, Delhi, India, Asia

Royal Gate, Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Detail, Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Royal Gate, Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Royal Gate, Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, Asia

Neolithic stone circle and henge at Avebury, UNESCO World Heritage Site, Wiltshire, England, United Kingdom, Europe

Neolithic stone circle and henge at Avebury, UNESCO World Heritage Site, Wiltshire, England, United Kingdom, Europe

Princess of Wales conservatory glasshouses, Kew Gardens, Royal Botanic Gardens, UNESCO World Heritage Site, Kew, London, England, United Kingdom, Europe

The Palm House at Royal Botanic Gardens, UNESCO World Heritage Site, Kew, London, England, United Kingdom, Europe

Xstrata Treetop Walkway, Royal Botanic Gardens, UNESCO World Heritage Site, Kew, London, England, United Kingdom, Europe

Fukien Chinese Assembly Hall gateway, Hoi An, UNESCO World Heritage Site, South Central Coast, Vietnam, Indochina, Southeast Asia, Asia

View of Lipari and Vulcano island from Belvedere Quattrocchi, Lipari Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe

Lipari Town, elevated view, Lipari Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe

Volcanic beach, Stromboli, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe

People walking on Gran Cratere rim, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, Sicily, Italy, Mediterranean, Europe

Vernazza, Cinque Terre, UNESCO World Heritage Site, Liguria, Italy, Europe

Manarola, Cinque Terre, UNESCO World Heritage Site, Liguria, Italy, Europe

Vernazza, Cinque Terre, UNESCO World Heritage Site, Liguria, Italy, Europe

Fishing boats and harbor, Vernazza, Cinque Terre, UNESCO World Heritage Site, Liguria, Italy, Europe

Vernazza, Cinque Terre, UNESCO World Heritage Site, Liguria, Italy, Europe

Harbour and boats, Vernazza, Cinque Terre, UNESCO World Heritage Site, Liguria, Italy, Europe

Vernazza, Cinque Terre, UNESCO World Heritage Site, Liguria, Italy, Europe

Mosaics of female gymnasts, The Roman Villa del Casale (Villa Romana del Casale), UNESCO World Heritage Site, Piazza Armerina, Enna, Sicily, Italy, Europe

Ashness Pier Jetty with autumnal colours, Derwentwater, Keswick, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Packhorse stone bridge over Watendlath Beck, Watendlath Tarn, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Ashness Pier Jetty in autumn, Derwentwater, Keswick, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Derwentwater in autumn, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Giant monolithic stone Moai statues at Rano Raraku, Rapa Nui (Easter Island), UNESCO World Heritage Site, Chile, South America

A male wearing red coat stood in Maligne Canyon during winter conditions, Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America

A man wearing red coat stood in Maligne Canyon during winter conditions, Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America

Lake Louise at Sunrise, Banff National Park, UNESCO World Heritage Site, Alberta, Canadies Rockies, Canada, North America

Lake Louise at Sunrise, Banff National Park, UNESCO World Heritage Site, Alberta, Canadies Rockies, Canada, North America

Sagrada Familia, UNESCO World Heritage Site, Barcelona, Catalonia, Spain, Europe

The Acropolis, UNESCO World Heritage Site, Athens, Greece, Europe

Gediminas Monument, Grand Duke of Lithuania, 1275-1341, Cathedral Square, UNESCO World Heritage Site, Vilnius, Lithuania, Europe

Cathedral reflected on a block of marble, UNESCO World Heritage Site, Vilnius, Lithuania, Europe

Pilies Street with, in the background, the Church Heritage Museum, St. Anne's Church and the Church of St. Francis and St. Bernard, seen from the tower of St. John's Church, UNESCO World Heritage Site, Vilnius, Lithuania, Europe

Gediminas Monument, Grand Duke of Lithuania, 1275-1341, Cathedral Square, UNESCO World Heritage Site, Vilnius, Lithuania, Europe

Saint Anne's Church and the Church of St. Francis and St. Bernard, UNESCO World Heritage Site, Vilnius, Lithuania, Europe

Adam Mickiewicz Monument near Saint Anne's Church and the Church of St. Francis and St. Bernard, UNESCO World Heritage Site, Vilnius, Lithuania, Europe

Piazza Duomo, Ortygia, UNESCO World Heritage Site, Syracuse, Sicily, Italy, Mediterranean, Europe

Statue of Roland,House of the Blackheads and Schwabe House, City Hall Square, Ratslaukums, UNESCO World Heritage Site, Riga, Latvia, Baltic region, Europe

Terraces of cafe on Dome Square by night, Old Town, UNESCO World Heritage Site, Riga, Latvia, Baltic region, Europe

Statue of Roland, House of the Blackheads and Schwabe House, City Hall Square, Ratslaukums,UNESCO World Heritage Site, Riga, Latvia, Baltic region, Europe