This long line of cement defensive wedges is named after the famous chocolate bar for obvious reasons.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

The first spinning jail built in the United States is the only one that still turns.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

What was once the largest mine in North America has left behind a hollow hill filled with bright blue waters.

This grand mansion has starred in everything from Bones to Buffy.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The simple log cabin of a famed loner and naturalist stands preserved as a symbol of the ultimate DIY lifestyle.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

This sinkhole was created by a tragic industrial accident and continues to ravage the surrounding landscape.

The oldest stone house in Paris was built by its most famous alchemist.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A huge musical instrument played by the ocean.

A chaotic collection of maritime artifacts, art, and really whatever else happens to be around.

An abandoned stretch of highway, deteriorating next to the operational one.

Science fiction's grandfather has a fittingly marvelous tomb.

Deadliest lake in the world suffocated over 1,746 people in one night.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.