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

A wooden replica of France's famous tower.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

The oldest continuously operating pharmacy in Europe.

Two well-hidden huts let animal lovers spend the night among the bears, wolves, and other predators of the forest.

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

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

A former imperial sea-fortress and Soviet prison.

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

Only a fragment of this 15th-century Dance of Death survives today.

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

Man-made mineral caves house massive bat colony.

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

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

This disappearing geyser has been attributed to witchcraft, but really it's all about rainfall.

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.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

People in Poland have rallied to save this unnatural desert from being reclaimed by the forest.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

Over 300 wood sculptures depicting characters from Slavic, Greek and Western folk tales fill this magical garden.

One of the windiest peaks in Crimea is home to an incredible set of cable bridges.

The saltiest lake in all of Crimea is also the pinkest of the pink and teeming with life.

One of Hungary's most influential places of learning is also home to one of the world's most beautiful libraries.