The labyrinthine home of the National Archives of Estonia is an experimental blend of architecture, art, and history.

The secret cells in the basement of the KGB's Estonian "Grey House" have been preserved as a grim Cold War museum.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

Mysterious craters may have been home to an ancient cult.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

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

A small museum in this border city displays the contraband art that has been stolen back from smugglers.

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

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

This Minsk museum has cat coffee, cat chess, cat art, and even a cat "staff," which visitors are free to take home.

Glowing orb in Minsk houses 8,600,000 items.

The apartment building where JFK's assassin lived after defecting to the Soviet Union.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

340-foot statue built to honour the Heroes of the Soviet Union.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

The eerie burnt-out remains of a prominent building where 30 protestors lost their lives.

A tribute to a Ukrainian heroine who went undercover and killed several Nazi operatives.

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

The spectacular Roshen Fountain show lights up the night sky all summer long, until it "hibernates" under the ice waiting for spring to come.

World's largest crossword puzzle spans the side of a towerblock, its clues scattered throughout the city.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

Welcome to the world's only museum dedicated to the Ukranian Easter egg.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.