On the outskirts of San Antonio, a small bridge is said to be the home of a mysterious local legend known as the "Donkey Lady."

A 131-year-old wunderkammer of Texas history.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

One person's lost luggage is another person's treasure.

This picturesque mansion has gone from opulent ruin to nature museum.

The personal library of the founder of modern neurology is open to visitors.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The sign at the garden gate reads: "These Plants Can Kill."