This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A church dedicated to the Mexican skeleton saint.

Twelve natural mummies are displayed in the crypt of this former monastery school.

Every equinox this Maya pyramid puts on a spooky ancient light show.

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

Extraordinary sculpture garden created by an eccentric English poet.

Frida Kahlo's childhood home, now a museum of her life and works.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The world's only museum devoted to the wonders of fluorescence.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

A stately palace has been converted into the world's largest cannabis museum.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Mountain where Jesus was first tempted by the Devil.

This cemetery features modernist statues as strange as its name.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

A terrific purveyor of natural history objects and curios.

Ever hear of the Milazzo Cage?

A burial vault located under Tiber Island in the middle of the Italian capital.

A wunderkammer of curious objects and intriguing art nestled within a hub of ancient Roman sites.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

A Nesting Doll of Churches.