ancient citadel above the city of Athens

one of the most famous and spectacular archaeological sites

one of Barcelona's most famous architectural landmarks

one of the longest underwater tunnels in the world

the imperial palace of the Ming and Qing dynasties

mosque and former church in Istanbul

one of the world's largest and most powerful hydroelectric power facilities

one of the most visited buildings in the world

one of the most iconic and photographed buildings in the world

one of the most famous archaeological sites in the world

a remarkable historical site located in Normandy, France

one of the most iconic and visually striking castles in the world

one of the most iconic and celebrated cathedrals in the world

one of the largest and most expensive administrative buildings in the world

crucial maritime route that connects the Atlantic and Pacific Oceans

one of the most significant monuments in Tibetan culture

one of the most iconic symbols of freedom and democracy globally

Performing-arts centre on the harbour in Sydney

a skyscraper in Dubai

pre-Columbian Maya City

an iconic statue of Jesus Christ

a remarkable architectural complex located in Valencia

an iconic ancient Roman amphitheater

tower on the Champ de Mars in Paris

largest pyramid in the Giza Necropolis

a series of fortifications

an ancient Incan citadel

one of the most impressive architectural wonders in Spain

an ancient archaeological site

an iconic and monumental basilica located in Barcelona

an iconic and magnificent white marble mausoleum