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

Immortal combat in a Moscow museum.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

Ukrainian defense contractor's center for studying "pyramid energy."

Back in the tiny USSR.

A Marxist summer camp full of fantastical statues lies tucked away and forgotten in the forests of Moscow.

Stalin's march toward a more modern USSR flooded a monastery, leaving a unique and extravagant nautical marker, "The Flooded Belfry."

This open-air museum was originally a World War II testing ground for German missiles and rockets.

This abandoned fighter jet launch center is now a haunting street racing course.

Once standing on solid ground, this slender beacon is a victim of the very shoreline it was charged with announcing.

Mysterious craters may have been home to an ancient cult.

This peculiar border irregularity is the only way to legally enter Russia without a visa.

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

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

This impressively complicated radioastronomy research center was once a tool of Soviet spies.

Spend the night in 1920s Latvia in this historic recreation and movie set.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

A vast and unlikely aviation museum kept alive for over 50 years due to one man's tenacity.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A pair of connected skyscrapers form this symbolic gateway.

In the hinterlands of Serbia's capital, a giant reflective mushroom houses an aeronautical history of the former Yugoslav republic.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

This half-finished "city of toys" was almost Italy's own Las Vegas.