A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

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

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Commonly acknowledged as the only public monument to the Devil himself.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

A little slice of Japan and its aesthetics in London's Holland Park.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

The grounds of this Jacobean estate contain one of the oldest mulberry trees in England.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

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

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

Fascinating town where normal life interfaces with the occult.

Ship-sized kinetic sculptural fantasy.