The Avenue of Mausolea is a series of grand palatial tombs.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Where Stoddart and Connolly suffered in the infamous Bug Pit.

Time capsule of a museum, in which the Soviet Union remains alive and kicking.

Lonely minaret stump of a destroyed city.

Forgotten German bunkers in China create a sharp cultural contrast.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

A battle between nature and architecture in the Cambodian jungle.

100 year tradition of fist fights, marked by marble footsteps.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.