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

Guests become prisoners on a visit to Latvian prison.

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

These abandoned vessels are destined to be reclaimed by the forest.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

A railway bridge leading nowhere stands lonely in the middle of a meadow.

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

These crumbling Latvian forts make for some haunting seaside ruins.

Flamboyant architecture from the turn of 20th century.

3,000 market stands in five former Zeppelin hangars.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

It's rumored this unique Baltic beacon was designed by Gustave Eiffel himself.

Troublesome students were detained in this tiny graffiti-covered university jail.

For the last century, this international border within a small town has appeared and disappeared various times.

A wooden replica of France's famous tower.

Abandoned Soviet base once stocked with short and medium range missiles pointed at western Europe.

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

This soviet pilot's graveyard is filled with headstones made of airplane fins.

This old Estonian mine has been kept like a sprawling time capsule of the local shale industry.

A former imperial sea-fortress and Soviet prison.

Wars fought and wars won are remembered by these abandoned bunker ruins.

Rusted cars, trucks, and buses form a fascinating collection of Soviet-era machinery.

A decommissioned submarine base makes a great space for graffiti art.