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

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

This small Estonian hill is covered in hand-made twig crosses that are said to bring good luck.

Man-made mineral caves house massive bat colony.

Spend your honeymoon where the Devil had his wedding.

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

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

The gutted remains of this Estonian mansion are a monument to a tragic love.

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

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

Mysterious craters may have been home to an ancient cult.

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

"There's nothing there," and other lies the KGB told us.

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

A historic scientific breakthrough that crosses nine borders.

The labyrinthine home of the National Archives of Estonia is an experimental blend of architecture, art, and history.

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

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

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

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

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

Built after WWII, the observatory site for the University of Copenhagen exhibits once world-class instruments.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

The remains of the observatory of the Danish astronomer who first measured the speed of light.