Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

The last planned Soviet city was built for the former residents of Pripyat after the Chernobyl disaster.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

Palace where the nearly un-killable Rasputin was murdered.

An art museum inside an active factory.

An abandoned 14th-century castle and prison complex on a small island in the Neva River.

Though it was heavily modified, fragments of the original medieval cathedral still survive.

A solemn, monumental, kitschy palace of worship honoring victory in the Great Patriotic War.

You'll find rocket launchers, not rollercoasters, at Russia's “military Disneyland.”

Secret Soviet city once home to Russian cosmonauts and space training facilities.

One of the last examples of Soviet architectural propaganda has a few technological tricks up its sleeve.

Former estate of Lenin, now home to his death mask.

For lovers of Soviet cinema, this museum is home to a vast collection of artifacts and costumes.

A 360 degree battlefield experience.

This massive monument honors the first human in space.

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

One of the largest collections of socialist realist art shows the surprising depth of the official art of the Soviet Union.

This Russian locomotive museum was once devoted just to Lenin's funeral before expanding to encompass Moscow's entire train history.

The oldest military monument in the United States.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

An abandoned church gets a second life as a massive beer hall and event space.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."