The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

A collection of objects supposedly singed by the hands of souls in purgatory.

The mummified relic of St. Antoninus.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

Museum preserving torture methods from the past.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A little sculpture with a large wardrobe.

The once highest point in China blends symbolic design with a kick of adrenaline.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

Beijing's expansive subterranean hiding spot now crumbles away as a tourist destination.

Go surfing on this urban wave, "hacked" by local surfers.

The prototype for all Nazi concentration camps.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

King Ludwig I's collection of beautiful women.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

The world's first experimental nutritionist is memorialized as the "Hippocrates of naval medicine."

The final resting place of soldiers' loyal canine companions.

The most loyal of little dogs, or a Victorian era publicity stunt?