Tucked away in the Caucasus Mountains in the north of Georgia, is the historic province of Khevsureti.
Checkpoint Charlie was the name given by the Western Allies to the best-known Berlin Wall crossing point between East Berlin and West Berlin during the Cold War.
Since the last train left in 1988, the once-regal station has come to symbolise Detroit's economic woes and has become a favourite canvas for graffiti artists.
The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres.