The only rotating bar in New Orleans has been slowly spinning since 1949.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

A self-built castle made by a mysterious man.

The largest wine cellar in the world is a 150-mile network of underground caves near the capital of Moldova.

The world's largest pineapple building honors Bathurst's favorite fruit.

A large-scale steel sculpture entitled 'The Shadow Boxer' pays tribute to Nelson Mandela.

The highest point in Belgium is a staircase to nowhere.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

A Museum of Psychiatry in a still-operating mental institution.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Hiding the longest subterranean river known in the world.

The summer residence of a Spanish ambassador who brought viticulture to an impoverished region, sparking its transformation into one of the world's best wine regions.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

In 1787, a group of delegates met at this very spot to drink, be merry, and ratify the Constitution of the United States.

A giant bronze monument to Kim Il-sung and Kim Jong-il is one of the most sacred sites in North Korea.

A highly symbolic tower in honor of Supreme Leader Kim Il-sung's personal philosophy.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

This museum promotes informed contraception by documenting its often secret past.

Op-art architecture designed for happiness.

The resting place for anonymous victims of the Danube's dark waters.