Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A 140-year-old castle with underground caves hidden in San Francisco.

A huge musical instrument played by the ocean.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

The oldest stone house in Paris was built by its most famous alchemist.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The naturally mummified body of a peasant girl saint.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

A young Italian couple has been locked in an embrace for over 6,000 years.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

This winding road through an Italian canyon may be the most scenic drive in the world.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

The location of the last witch trials of Italy, known as "The Salem of Europe."

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Giant, pink stuffed rabbit on an Italian mountain.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

Venice's "Island of the Mad."

The glowing blue Nymphaeum of Emperor Tiberius.

Palace where the nearly un-killable Rasputin was murdered.