66,000 pieces of art, donated by one of the world's richest men.

This ancient jade mask depicting the Zapotec bat god was found in the ruins of the pyramids of Monte Alban.

Murals made with millions of colorful stones adorn the abandoned building.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Psychedelic murals coat the inside of a nondescript research library.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

Get a privileged view over Mexico City's Historic Center from a terrace right in its heart.

Underneath the historic center of Mexico City, the remains of a temple dedicated to the Aztec god of the wind.

This museum houses two of Mexico's most impressive Aztec monoliths.

A private collection of massive steel monsters guarding a Texas pipe works.

A park filled with vibrant mosaics created by more than 300 folk artists.

A health museum containing a 27’’½-foot intestine.

Giant heads occasionally litter the industrial Houston neighborhood where sculptor David Adickes has his studio.

Where Aleister Crowley attempted to seize the Hermetic Order of the Golden Dawn in a mask and a kilt.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

Inside this Jewish cemetery is a memorial to soldiers who deserted the German army and were executed.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

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

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

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

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Few of the many visitors to this resort town know of its hidden Maya ruins.