This hidden collection of everyday objects illustrates life within communist Poland.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

This ornate church has survived Nazi and Soviet occupation, including a short stint as a Soviet-era gymnasium and cinema.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

Mysterious craters may have been home to an ancient cult.

"There's nothing there," and other lies the KGB told us.

This historic textile city was abandoned after being ravaged by fire.

Eerie ruins of an abandoned medieval fishing village crumble atop an unforgiving stretch of earth.

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

A striking Soviet memorial commemorates the liberation of Belarus from the Nazis.

Remains of the old fortification along the Western border of the USSR, now an elaborate defense museum.

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.