The most visited, and possibly most controversial, museum in Germany.

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

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

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

Cold war icon and onetime "hole" in the iron curtain.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

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.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Romania's triumphal arch looks out over Bucharest.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

The Arctic Circle runs through this isolated spot north of Iceland.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Historic funicular railway, believed to be the shortest railroad in the world.

The legendary building that needed ghostly approval before being built.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A museum dedicated to the alleged Roswell Incident.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Natural sonic phenomenon comes with a grisly legend of murder and blood.