This sprawling stronghold has been at the center of some of South India's bloodiest wars.

A former palace designed for the consorts of the Travancore royal dynasty.

The ancient water tanks remain some of the ruined city’s most beautiful architecture.

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

Bold contestants slide in a rice paddy behind two charging bulls.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

Started as a kitchen garden, now the second largest botanical garden in the world.

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

An eerie, derelict amusement park in Berlin.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

A passage grave used in neolithic rituals.

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

Discover the taste of mold.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A hip bar decorated with walls of golden skulls.

A crumbling hospital from the 1850s on Roosevelt Island.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

Commonly acknowledged as the only public monument to the Devil himself.

An ancient Egyptian temple in the middle of Madrid, Spain.