When the proposed Chigirinsky Nuclear Power Plant was canceled in the wake of the Chernobyl disaster, the Ukrainian town of Orbita was left to molder away.

Decades after the end of the Cold War, experts are still debating whether the Soviet Union actually stored live nuclear warheads in three top-secret bunkers in Czechoslovakia. We visited the decaying sites to see what remains of this terrifying legacy.

A newly declassified 1979 memo gives intriguing details about the Ukrainian KGB's efforts to thwart a "plot by Western security agencies" to undermine the Soviet Union by importing subversive literature into the country under the framework of the 1975 Helsinki Accords.

Newly declassified documents from the KGB archive in Ukraine shed light on how one leg of a 1947 journey to the Soviet Union by U.S. writer John Steinbeck and noted war photojournalist Robert Capa went down.

The dead communist revolutionaries Lev Trotsky and Vladimir Lenin reportedly showed up at seances in a Ukrainian town in the 1940s, landing a group of occultists in trouble with the Soviet authorities for supposed denunciations of dictator Josef Stalin from beyond the grave.