3,000 market stands in five former Zeppelin hangars.

An abandoned textile factory on the "island of crows" was home to Estonia's first workers' strike.

This Soviet-era "closed town" was a top secret uranium producer often left off of maps.

Historic slum of Tartu.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

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

Mysterious craters may have been home to an ancient cult.

Legend has it that not even Stalin could pull down the 2015 European Tree of the Year.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

A former imperial sea-fortress and Soviet prison.

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

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

The Guardian of Tallinn.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

Plenty of old carney magic still haunts this photogenic amusement park.

A bright and wacky exhibit answers every question you may have had about human excrement, flatulence, and more.

Tracking the 1,500-year history of Korea's star cabbage.

Sweden's oldest animated sign is still lighting up the skyline today.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Cold war icon and onetime "hole" in the iron curtain.

Berlin's old airport.