Altes Rathaus (Old Town Hall) at dusk, Bamberg, UNESCO World Heritage Site, Bavaria, Germany, Europe

Dome of the Rock, Old City, UNESCO World Heritage Site, Jerusalem, Israel, Middle East

View of Dome of the Rock and the Old City, UNESCO World Heritage Site, Jerusalem, Israel, Middle East

Los Roques de Garcia at Caldera de las Canadas, Pico de Teide at sunset, National Park Teide, UNESCO World Heritage Natural Site, Tenerife, Canary Islands, Spain, Europe

Angkor Wat Archaeological Park, UNESCO World Heritage Site, Siem Reap, Cambodia, Indochina, Southeast Asia, Asia

Piazza del Duomo, Santa Maria Assunta Cathedral, Siena, UNESCO World Heritage Site, Siena Province, Tuscany, Italy, Europe

Los Roques de Garcia at Caldera de las Canadas, Pico de Teide at sunset, National Park Teide, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe

Famous old bridge reconstructed after collapsing in the war in the old town of Mostar, UNESCO World Heritage Site, Bosnia-Herzegovina, Europe

The Cliff Palace Indian dwelling, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America

Gondola on Grand Canal and Rialto Bridge in winter, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Bridge of Sighs in winter, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Seville Cathedral, UNESCO World Heritage Site, Seville, Andalucia, Spain, Europe

Cathedral of St Peter, UNESCO World Heritage Site, Modica, Sicily, Italy, Europe

Brimstone Hill Fortress, UNESCO World Heritage Site, St. Kitts, St. Kitts and Nevis, Leeward Islands, West Indies, Caribbean, Central America

City Wall, originally built in the 12th century, Avila, UNESCO World Heritage Site, Castile and Leon, Spain, Europe

Castel Sant'Angelo Castle with Ponte Sant'Angelo Bridge, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Doge's Palace and Piazzetta against San Giorgio Maggiore in early morning light, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

View of The Acropolis, UNESCO World Heritage Site, at sunset from Filopappou Hill, Athens, Greece, Europe

View of The Acropolis, UNESCO World Heritage Site, during late afternoon from Filopappou Hill, Athens, Greece, Europe

Mount Fuji, UNESCO World Heritage Site, and Lake Kawaguchiko at twilight, Yamanashi Prefecture, Honshu, Japan, Asia

The Ponte San Angelo and Hadrian's Tomb, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Remains of the Colosseum of Rome built around 70AD, allegedly the largest ever built, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Antiguo Ayuntamiento, home of the provincial government building, UNESCO World Heritage Site, Cienfuegos, Cuba, West Indies, Caribbean, Central America

Los Roques de Garcia at Caldera de las Canadas, Pico de Teide, National Park Teide, UNESCO World Heritage Natural Site, Tenerife, Canary Islands, Spain, Europe

Court of the Lions, Alhambra Palace, UNESCO World Heritage Site, Granada, Andalucia, Spain, Europe

The Cathedral, UNESCO World Heritage Site, Noto, Sicily, Italy, Europe

City Wall, originally built in the 12th century, Avila, UNESCO World Heritage Site, Castile and Leon, Spain, Europe

View of the old town of Florence with the Duomo di Firenze and Brunelleschi's Dome in the foreground, Florence, UNESCO World Heritage Site, Tuscany, Italy, Europe

Cloister of Saint Francis Monastery, UNESCO World Heritage Site, Quito, Pichincha Province, Ecuador, South America

The Tower of David (the Jerusalem Citadel), Old City, UNESCO World Heritage Site, Jerusalem, Israel, Middle East

View over ruined Roman town to the lighthouse, The Agora, Archaeological Park, Paphos, UNESCO World Heritage Site, Cyprus, Europe

Famous old bridge reconstructed after collapsing in the war in the old town of Mostar, UNESCO World Heritage Site, Bosnia-Herzegovina, Europe

The Upper Falls in the Grand Canyon of Yellowstone in the Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

The Colosseum, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

View of the Imperial Forum, built and used from around 45BC until 115AD, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

The neo-gothic Hungarian Parliament building, designed by Imre Steindl, dating from 1902, UNESCO World Heritage Site, Budapest, Hungary, Europe

Castel Sant'Angelo, Statues of Ponte Sant'Angelo, Unesco World Heritage Site, Rome, Latium, Italy, Europe

Piazza Della Rotonda and The Pantheon, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Palace gardens of the Prague castle, UNESCO World Heritage Site, Prague, Czech Republic, Europe

Aphrodite's Rock at sunset, Paphos, UNESCO World Heritage Site, South Cyprus, Cyprus, Mediterranean, Europe

Bridge St. Benezet over Rhone River at sunrise, UNESCO World Heritage Site, Avignon, Vaucluse, Provence-Alpes-Cote d'Azur, France, Europe

The ruins of the ancient city of Mycenae, UNESCO World Heritage Site, Peloponnese, Greece, Europe

Mandraki Harbour medieval windmill and Fortress at sunset, Rhodes Town, UNESCO World Heritage Site, Rhodes, Dodecanese, Greek Islands, Greece, Europe

Three Brothers, Old Town, UNESCO World Heritage Site, Riga, Latvia, Europe

Piazza del Duomo, Santa Maria Assunta Cathedral, Siena, UNESCO World Heritage Site, Siena Province, Tuscany, Italy, Europe

The old city walls of the Old Town of Tallinn, UNESCO World Heritage Site, Estonia, Baltic States, Europe

Erechtheion, with Porch of the maidens or Caryatids, Acropolis, UNESCO World Heritage Site, Athens, Greece, Europe

The Roman Forum, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

The Roman Forum, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Rosenkrantztarnet Tower, Bryggen, UNESCO World Heritage Site, Bergen, Hordaland, Norway, Scandinavia, Europe

Aphrodite's Rock, Paphos, UNESCO World Heritage Site, South Cyprus, Cyprus, Mediterranean, Europe

Aphrodite's Rock, Paphos, UNESCO World Heritage Site, South Cyprus, Cyprus, Mediterranean, Europe

Aphrodite's Rock, Paphos, UNESCO World Heritage Site, South Cyprus, Cyprus, Mediterranean, Europe

The Treasury (Al-Khazneh), Petra, UNESCO World Heritage Site, Jordan, Middle East

Pico del Teide, National Park Teide, UNESCO World Heritage Natural Site, Tenerife, Canary Islands, Spain, Europe

World famous Sancho Beach, Fernando de Noronha, UNESCO World Heritage Site, Brazil, South America

Seville Cathedral and Giralda, UNESCO World Heritage Site, Seville, Andalucia, Spain, Europe

Portovenere (Porto Venere), UNESCO World Heritage Site, colourful harbourfront houses, boats and castle, Ligurian Riviera, Liguria, Italy, Europe

Rosenkrantztarnet Tower, Bryggen, UNESCO World Heritage Site, Bergen, Hordaland, Norway, Scandinavia, Europe

San Marco bell tower (Campanile) and Doge's Palace, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Aphrodite's Rock, Paphos, UNESCO World Heritage Site, South Cyprus, Cyprus, Mediterranean, Europe

The Upper Falls in the Grand Canyon of Yellowstone in the Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Palazzo Ducezio (Town Hall), UNESCO World Heritage Site, Noto, Sicily, Europe

Cathedral and busy outdoor cafe, evening blue hour, Old Town, Dubrovnik, UNESCO World Heritage Site, Dalmatia, Croatia, Europe

Dome of the Rock, Temple Mount, Old City, UNESCO World Heritage Site, Jerusalem, Israel, Middle East

The Colosseum, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

St. Peters' dome, Vatican City, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Sevilla Cathedral and Giralda, UNESCO World Heritage Site, Seville, Andalucia, Spain, Europe

Piazza Della Rotonda and The Pantheon, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Seville Cathedral seen from Giralda bell tower, UNESCO World Heritage Site, Seville, Andalucia, Spain, Europe

San Francesco Church, Noto, UNESCO World Heritage Site, Sicily, Italy, Europe

Doge's Palace, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

A section of Hadrian's Wall at Housesteads Fort, Bardon Mill, UNESCO World Heritage Site, Northumberland, England, United Kingdom, Europe

St. Paul`s Pillar and Agia Kyriaki, Paphos, UNESCO World Heritage Site, Cyprus, Europe

The Cliff Palace Indian dwelling, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America

Flowers and blue sea frame the old castle and church on the promontory, Portovenere, UNESCO World Heritage Site, La Spezia Province, Liguria, Italy, Europe

Temple di Saturno, The Roman Forum, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Seville Cathedral, UNESCO World Heritage Site, Seville, Andalucia, Spain, Europe

View over ruined Roman town to the lighthouse, The Agora, Archaeological Park, Paphos, UNESCO World Heritage Site, Cyprus, Europe

View over Sasso Barisano to Monasterio di Sant'Agostino monastery, UNESCO World Heritage Site, Matera, Basilicata, Puglia, Italy, Europe

Blue sky at sunrise frames the ancient Colosseum (Flavian Amphitheatre), UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Cesky Krumlov Castle dating back to 1240, Cesky Krumlov, UNESCO World Heritage Site, South Bohemia, Czech Republic, Europe

View of the Old City, UNESCO World Heritage Site, Jerusalem, Israel, Middle East

View of Dome of the Rock, Old City, UNESCO World Heritage Site, Jerusalem, Israel, Middle East

The Tower of David (the Jerusalem Citadel), Old City, UNESCO World Heritage Site, Jerusalem, Israel, Middle East

The Cliff Palace Indian dwelling, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America

The Cathedral, UNESCO World Heritage Site, Noto, Sicily, Italy, Europe

Bode Museum, Museum Island, UNESCO World Heritage Site, Spree River, TV Tower, Mitte, Berlin, Germany, Europe

View towards Campanile and Doge's Palace, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

View of Dome of the Rock, Old City, UNESCO World Heritage Site, Jerusalem, Israel, Middle East

View of St. Peter's Basilica, Vatican, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Cave Temple on Elephanta Island, UNESCO World Heritage Site, Mumbai (Bombay), Maharashtra, India, Asia

Bode Museum, Museum Island, UNESCO World Heritage Site, Spree River, TV Tower, Mitte, Berlin, Germany, Europe

View over the city with Ponte Pietra and River Adige at dawn, Verona, UNESCO World Heritage Site, Veneto, Italy, Europe

Elevated view, Old Town and Lokrum Island from Minceta Tower, Fort on City Walls, Dubrovnik, UNESCO World Heritage Site, Croatia, Europe

Piazza Duomo, San Gimignano, UNESCO World Heritage Site, Siena Province, Tuscany, Italy, Europe

St. Mark's Basilica, Piazza San Marco, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Bridge of Sighs with Doge's Palace, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Pico de Teide at sunset, UNESCO World Heritage Site, Tenerife, Canary Islands, Spain, Europe

The famous Opera House, UNESCO World Heritage Site, Sydney, New South Wales, Australia, Pacific