In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

A museum and shop on Bourbon Street located in the French Quarter.

New Orleans' famous cemetery, located on the site of a former race track.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The second oldest continuously operating bar in Louisiana.

The final resting place of New Orleans' most famous voodoo priestess.

A snapshot of the city's fascinating voodoo culture.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

An incarceration museum on the spot of possibly the oldest prison in England.

Hear the quietest sound from across the dome.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Art and a pun, all in one.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.