Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Museum dedicated to awful artwork.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

This public work of art pays tribute to an early Aboriginal Australian constellation pattern.

The world's largest underwater restaurant is submerged off the southern tip of Norway.

This is the house that spite built.

After funding was cut for a memorial to the Danish author, the sculptor had his statue ceremonially lowered into the city harbor.

This bridge is haunted by the ghost of a distraught mother.

A nearly century-old amusement park is quietly decaying in a riverside forest in South Carolina.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Unusual rock formations eroded into a landscape of stone beasts.

One of the few places in the world where visitors can walk alongside fossilized tracks from 80 different dinosaur species.

Modern pyramids built to channel positive energy have also fomented local tales of animal sacrifice.

From 135 feet high riders plunge down the world's tallest freestanding body slide at 65 mph.

This massive rock balanced for thousands of years being tossed here during a volcanic eruption.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

A 40-foot waterfall flows into this unique natural swimming hole.

This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.

This three-dimensional brick mural is the longest of its kind in the United States.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

A tree that defies gravity grows in an ancient ruin.

The Bourbon royal family had this unique octagonal hunting "cottage" built on a tiny islet in Lake Fusaro.