This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Where commuters walk through remnants of an ancient Greek necropolis.

The ghost town where the villagers refuse to leave.

The hallucinogenic center of the ancient world.

A former French military respite turned jungle tourism hotspot.

Built by King Norodom to honor his late father.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

These crumbling towers are some of the last remnants of a centuries-old Vietnamese culture.

An extravagant monument to an extravagantly unpopular Emperor.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

Over 2,000 ancient temples dot the Myanmar landscape at the site of this famed archaeological site.

World's largest permanent maze made of 18,000 conifers.

Swiss vineyards in a UNESCO heritage site.

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

The university library shaped like a giant piece of Swiss cheese.

Florentine Renaissance style building in Switzerland, home to the world's largest taxidermy Great White Shark.

Artworks by loners, prisoners and the criminally insane.