View of historic centre and towers in Piazza del Duomo, San Gimignano, UNESCO World Heritage Site, Province of Siena, Tuscany, Italy, Europe

View of restaurants in Piazza del Duomo at dusk, San Gimignano, UNESCO World Heritage Site, Province of Siena, Tuscany, Italy, Europe

View of narrow street in San Gimignano at dusk, San Gimignano, UNESCO World Heritage Site, Province of Siena, Tuscany, Italy, Europe

Aerial view by drone of Bansko old town and Pirin National Park, UNESCO World Heritage Site, Bankso, Bulgaria, Europe

Exterior view of Wartburg Castle whose foundation was laid in 1067, UNESCO World Heritage Site, Eisenach, Thuringia, Germany, Europe

View of the Imperial city of the Nguyen Emperors, The Citadel, Hue, UNESCO World Heritage Site, North Central Coast, Vietnam, Indochina, Southeast Asia, Asia

A view over teracotta rooftops to the Duomo and Campanile, Florence, UNESCO World Heritage Site, Tuscany, Italy, Europe

View of Rialto Bridge, Grand Canal and restaurants, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

View of Freya's Castle and Vishnu Temple on the left and Wotan's Throne on the right at sunrise viewed from Cape Royal, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View from bell tower of Chiesa di San Pietro Barisano to Sasso Barisano and cathedral, UNESCO World Heritage Site, Matera, Basilicata, Puglia, Italy, Europe

Aerial drone view of Leme Beach in the Copacabana district at sunrise with the iconic Sugarloaf Mountain in the background, UNESCO World Heritage Site, Rio de Janeiro, Brazil, South America

View of Gran Cratere, Lipari and Salina Island, Vulcano Island, Aeolian Islands, UNESCO World Heritage Site, north of Sicily, Italy, Mediterranean, Europe

View over Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

View of Piazza del Campo with the historical Palazzo Pubblico and its Torre del Mangia, Siena, UNESCO World Heritage Site, Tuscany, Italy, Europe

Top view of Piazza del Campo with the historical buildings and The Fonte Gaia fountain, Siena, UNESCO World Heritage Site, Tuscany, Italy, Europe

View of the Baptistery and Campanile di Giotto, Piazza del Duomo, Florence (Firenze), UNESCO World Heritage Site, Tuscany, Italy, Europe

View of Vinales Valley, UNESCO World Heritage Site, Vinales, Pinar del Rio Province, Cuba, West Indies, Caribbean, Central America

High view looking over Polonnaruwa, UNESCO World Heritage Site, Sri Lanka, Asia

View towards the Monastery of Saint Nicholas Anapafsas (Anapausas), Meteora, UNESCO World Heritage Site, Thessaly, Greece, Europe

View over Athens and The Acropolis, UNESCO World Heritage Site, at sunset from Likavitos Hill, Athens, Attica Region, Greece, Europe

Mala Strana (Lesser Town), elevated view, UNESCO World Heritage Site, Prague, Bohemia Region, Czech Republic, Europe

View of Old Town, UNESCO World Heritage Site, Riga, Latvia, Europe

Elevated view of Schonbrunn Palace, UNESCO World Heritage Site, and Vienna city skyline viewed from Schonbrunn Palace garden, Vienna, Austria, Europe

View of the old town from the city walls, UNESCO World Heritage Site, Dubrovnik, Croatia, Europe

Northern view of the Grand Canyon from Papago Point on the south rim, the rock on the left is Hollenback Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of arched bridge on Kunming Lake at Yihe Yuan, The Summer Palace, UNESCO World Heritage Site, Beijing, People's Republic of China, Asia

View over Geirangerfjord, UNESCO World Heritage Site, Sunnmore, Norway, Scandinavia, Europe

Aerial view of the UNESCO World Heritage Site of Ilulissat Icefjord, near Ilulissat (Jakobshavn), Greenland, Polar Regions

View of the grand thermal baths, Villa Adriana (Hadrian's Villa), UNESCO World Heritage Site, Tivoli, Lazio, Italy, Europe

Panorama view from the Starboard Aft side of the Sinking Ship formation, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View over the Tigris River from the old Assyrian town of Ashur (Assur), UNESCO World Heritage Site, Iraq, Middle East

View over the ancient city of Ur, The Ahwar of Southern Iraq, UNESCO World Heritage Site, Iraq, Middle East

View of the Tower of London, UNESCO World Heritage Site, and Tower Bridge from elevated position, London, England, United Kingdom, Europe

A fisheye view of a deep chasm east of Pinal Point at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Panorama view of Grand Canyon from Widforss Point on the North Rim, UNESCO World Heritage Site, Arizona, United States of America, North America

View towards North Parade Buildings, Bath, UNESCO World Heritage Site, Somerset, England, United Kingdom, Europe

Fisheye view of a deep chasm near Papago Point at Grand Canyon with Zuni Point in the distance, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the Bay of Kotor, UNESCO World Heritage Site, Montenegro, Europe

El Capitan and the Yosemite Valley from the Merced River at Valley View, Yosmeite National Park, UNESCO World Heritage Site, California, United States of America, North America

Interior view of the Great Temple of Abu Simbel with its successively smaller chambers leading to the sanctuary, UNESCO World Heritage Site, Abu Simbel, Egypt, North Africa, Africa

View of cypress trees and landscape in the Val d'Orcia near San Quirico d' Orcia, UNESCO World Heritage Site, province of Siena, Tuscany, Italy, Europe

View of Baptistery of San Giovanni, Pisa Cathedral and Leaning Tower of Pisa, UNESCO World Heritage Site, Pisa, Province of Pisa, Tuscany, Italy, Europe

View over the Hutongs and Pagodas in the Kaiyuan Temple, UNESCO World Heritage Site, Quanzhou, Fujian, China, Asia

View of Alte Nationalgalerie and Kolonnadenhof, UNESCO World Heritage Site, Museum Island, Mitte, Berlin, Germany, Europe

Elevated view of Dubrovnik from the city walls, Dubrovnik, UNESCO World Heritage Site, Dalmatia, Croatia, Europe

Elevated view over the square at dusk, Old Town Square (Rynek Stare Miasto), UNESCO World Heritage Site, Warsaw, Poland, Europe

View the original wall around the town of Visby, UNESCO World Heritage Site, Gotland Island, Sweden, Scandinavia, Europe

View of Trevi Fountain in bright sunlight, Piazza di Trevi, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Panoramic view of San Quirico d'Orcia, Val d'Orcia, UNESCO World Heritage Site, Tuscany, Italy, Europe

Angkor Wat Temple, UNESCO World Heritage Site, at night, lit for a special light show, Siem Reap, Cambodia, Indochina, Southeast Asia, Asia

Eype mouth, Dorset coast path to Thornecombe Beacon, Jurassic Coast, UNESCO World Heritage Site, near Bridport, Dorset, England, United Kingdom, Europe

Elevated view of San Gimignano and towers at sunset, San Gimignano, UNESCO World Heritage Site, Tuscany, Italy, Europe

Aerial view of Venice with Basilica San Marco and the Doge's Palace looking east, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

View of the column of the winged lion of St. Mark, and San Giorgio Maggiore from Piazzetta San Marco, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

View of Old Town, UNESCO World Heritage Site, and Ploce Beach, Dubrovnik, Dalmatia, Croatia, Europe

Gondolas with view to Basilica di Santa Maria della Salute after snow, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

View of San Gimignano skyline, San Gimignano, UNESCO World Heritage Site, Province of Siena, Tuscany, Italy, Europe

View of San Gimignano skyline, San Gimignano, UNESCO World Heritage Site, Province of Siena, Tuscany, Italy, Europe

A view of Rue St. Louis in the Old Town, UNESCO World Heritage Site, Quebec City, Quebec Province, Canada, North America

Elevated view of Ogimachi, UNESCO World Heritage Site, Shirakawa-go, Toyama Prefecture, Honshu, Japan, Asia

A view of the Duomo through old buildings in Florence, UNESCO World Heritage Site, Tuscany, Italy, Europe

An early morning view through a stone arch in the hilltop town of Pienza, Val d'Orcia, UNESCO World Heritage Site, Tuscany, Italy, Europe

View of Rialto Bridge, Grand Canal and boats, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Sunset view of the town, San Cristobal de La Laguna, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Atlantic, Europe

Aerial view of the salt pans and lighthouse at Faro de Fuencaliente. UNESCO Biosphere Site, La Palma, Canary Islands, Spain, Atlantic, Europe

View from castle Aggstein down on the Danube River in fall, Wachau Cultural Landscape UNESCO World Heritage Site, Austria, Europe

View over the town of Melk from the Melk Abbey, Benedictine abbey, Melk, Wachau Cultural Landscape UNESCO World Heritage Site, Danube, Wachau, Austria, Europe

View over Sasso Caveoso to Monte Errone and cathedral at sunrise, UNESCO World Heritage Site, Matera, Basilicata, Puglia, Italy, Europe

View of the Devil's Throat, part of the Iguazu Falls, UNESCO World Heritage Site, Foz do Iguacu, State of Parana, Brazil, South America

View of the Devil's Throat, part of Iguazu Falls, UNESCO World Heritage Site, Foz do Iguacu, State of Parana, Brazil, South America

View of the Iguazu Falls at sunset, UNESCO World Heritage Site, Foz do Iguacu, State of Parana, Brazil, South America

Roman Forum ruins, elevated view from Campidoglio, Historic Centre, Rome, UNESCO World Heritage Site, Lazio, Italy, Europe

View over Douro River at sunset to Ribeira District, UNESCO World Heritage Site, Porto (Oporto), Portugal, Europe

Night view of a street in San Gimignano, UNESCO World Heritage Site, Tuscany, Italy, Europe

Yosemite Valley and Bridalveil Fall from Tunnel View, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

View of Old Town, UNESCO World Heritage Site, Riga, Latvia, Europe

View from St. Laurentius Cathedral across the Old Town, Trogir, UNESCO World Heritage Site, Dalmatia, Croatia, Europe

View of the bell tower in Trinidad, UNESCO World Heritage Site, Sancti Spiritus, Cuba, West Indies, Caribbean, Central America

View of boats in harbour of Dubrovnik Old Town from the wall, UNESCO World Heritage Site, Dubrovnik, Dalmatia, Croatia, Europe

View of Dubrovnik from the city walls, UNESCO World Heritage Site, Dubrovnik, Croatia, Europe

Tunnel View, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Grand Canyon view east of Pinal Point on the south rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grand Canyon view with a rock window beneath a cliff on the right, located west of Pinal Point on the south rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A winter dawn view of Grand Canyon from Bright Angel Trail on the South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the North Rim of Grand Canyon National Park from Bright Angel Point, UNESCO World Heritage Site, Arizona, United States of America, North America

Aerial view of Unesco world heritage site of Abbey of Fontenay complex, France

View of terracota rooftops of The Ribeira district from Dom Luis I bridge, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of the Dom Luis I bridge over Douro River and terracota rooftops, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

View of the Dom Luis I bridge over Douro River aligned with colourful buildings at sunset, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

Elevated view of Cathedral, Vara de Rei Square and Dalt Vila, UNESCO World Heritage Site, Ibiza Town, Eivissa, Balearic Islands, Spain, Mediterranean, Europe

View of restaurants and bars in Dalt Vila at dusk, UNESCO World Heritage Site, Ibiza Town, Eivissa, Balearic Islands, Spain, Mediterranean, Europe

Mount Kerkeslin and Horseshoe Lake, Jasper National Park, UNESCO World Heritage Site, The Rockies, Alberta, Canada, North America

Doubtful Sound, Fiordland National Park, UNESCO World Heritage Site, Southland, South Island, New Zealand, Pacific

Mayan archaeological site, Tulum, Yucatan, Mexico, Central America

The Grand Canyon National Park, UNESCO World Heritage Site, Arizona, USA, North America

Windmill on the canal, Kinderdijk, UNESCO World Heritage Site, Holland (The Netherlands), Europe

A view from the upper trail, Iguazu Falls National Park, UNESCO World Heritage Site, Misiones, Argentina, South America

Elevated winter view over the Old Town towards Alexander Nevsky cathedral, Tallinn, UNESCO World Heritage Site, Estonia, Baltic States, Europe

Ca D'Oro, famous Venetian Palace on Grand Canal, elevated view after snow, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

View from the castle of Cesky Krumlov, UNESCO World Heritage Site, Czech Republic, Europe