A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

Legends of time travel and magical woodland creatures bolster the natural charm of this verdant sanctuary in the midst of Moscow.

A strange rock formation with numerous legends trying to explain it.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

The "Mystery and Company of Merchant Adventurers" is an Elizabethan-era hangout in Moscow.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Super-heavy Nazi architectural experiment.

The world's northernmost aquarium looks like it has fallen over.

This disused church, left to the elements of the Arctic Circle's forests is open for exploration.

Monastery, army base, and infamous Soviet Gulag in the far Russian north.

Citizens of Norway want to gift the peak of Mount Halti to Finland for its 100th birthday.

No one knows why ancient labyrinths were built on this tiny northern island.

The world’s largest knitted mitten is displayed in one of Sweden’s smallest Arctic villages.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Old cabin-like homes in a rural community untouched by time are known for their vibrant and colorful window shutters.

Warsaw's fantastically preserved gasworks...almost.

Where the interconnection of German power grids should be.

A little church on a tiny island looks like something from a fairy tale.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

The "Prussian Versailles" that is as glorious today as when it was built.

A quaint Russian village in the middle of a German metropolis.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.