This amazing oasis of art and plants is hidden on the outskirts of Marrakesh.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

This king penguin is a knighted brigadier of the Norwegian Army.

This early version of the guillotine was used to execute the man responsible for its construction.

Protecting the dead from opportunistic body snatchers.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

Natural cathedral designed by Italian artist Giuliano Mauri.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

Architectural monsters are devouring this palace's every door and window.

The final resting place of the poets Shelley and Keats.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

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

After this one-of-a-kind palace was built the architect's hands are said to have been cut off to keep it that way.

The world's first museum dedicated to the work of game-changing naturalist Charles Darwin.

An early-20th-century "dacha" village of quaint cottages curiously located in a modern part of Moscow.

Immortal combat in a Moscow museum.