Sacred Buddhist home of some spiritual monkeys.

Deep in the Thar desert, a temple crawling with thousands of holy rats.

Modest by day, illuminated majestically at sunset.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Sacred Indian temple that’s all monkey business.

The remains of what was, not so long ago, the world's largest city.

A nearly unconquerable island-fort in the Indian Ocean.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

A mecca for India's Jains.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

A saintly relic hidden in a Prague church basement.

Abandoned Nazi train station turned underground astroparticle laboratory.

France's most famous cemetery, with some of its most curious tombs.

An eerie, derelict amusement park in Berlin.

The most visited, and possibly most controversial, museum in Germany.

A church of bones, decorated with 40,000 human skeletons.

Bohemian paradise covered in majestic forests.

Once the home of a hermetic monk, this cave now houses a small church.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

It houses the remains of a 17th-century version of the Titanic.