The ruined doorway is a portal to the building's turbulent and torturous past.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

An ancient octagonal weather station named for the eight Greek gods of wind.

A historic chapel filled with colorful murals and a colorful past.

Tel Aviv's popular neighborhood went though endless waves of transformation.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

One of the best examples of a Byzantine period monument in Albania.

The hands on this clock appear to be created by two workers sweeping debris into careful positions.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

A miniature city, once ruled by the Queen of the Netherlands.

Now a museum, this building was once a 14th-century monastery and the place where the founder of the Dutch nation lived and was assassinated.

A secluded, little-known temple hidden amid the dense jungle.

Though it was originally dedicated to the Hindu god Shiva, Baphuon was converted to a Buddhist temple in the 15th century, complete with a massive hidden statue.

Hoax, mistake, or evidence of dinosaurs in human times?

A small 12th-century temple surrounded by waters believed to have curative properties.

The capital of Cambodia is named after the hill on which this ancient temple complex stands.

One of the biggest markets in Asia, under one of the continent's largest domes.

Bombed and burned, this monument represents the often controversial ties between Vietnam and Cambodia.

Khmer Rouge's high security prison.

5,000 skulls in memorial to those killed by the Khmer Rouge.

This ruined relic of the medieval city of Jahanpanah is a quiet oasis in the middle of New Delhi.

A blooming house of worship for the masses.

A startling, centuries-old subterranean marvel hides in plain sight.

The beautiful 16th-century stepwell lies in the shadow of a famous fortress.