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

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

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

Mysterious craters may have been home to an ancient cult.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

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

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

This behemoth bovine guards an Estonian town and is a memorial to the lost species.

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

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

A small museum showcasing various communication equipment and laptops in the middle of the southeast Estonia countryside.

A wooden statue of an Estonian pagan god and King of the Setos stands atop a sacred hill.

This unique eatery offers a taste of Estonia's "Onion Route."

See tools once used for processing this coffee-substitute plant before sampling its flavor firsthand.

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

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

Man-made mineral caves house massive bat colony.

This old and disused water tower has received a new life as an art gallery with a piano staircase.

A wealthy aristocratic family built this Disney-worthy, fairy-tale castle.

Learn to drink tea like an Estonian at this museum.

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

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

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