Once the home of a hermetic monk, this cave now houses a small church.

A small island dotted with old, historic Finnish buildings.

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

An alien church provides much needed silence in the midst of a Finland shopping center.

A subterranean house of worship carved right out of the bedrock.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

Once a year, local students "clean" this statue with a champagne shower.

It's rumored this unique Baltic beacon was designed by Gustave Eiffel himself.

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

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

A clerical error gave rise to this imaginary micronation in the southwestern corner of Estonia.

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

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

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

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

This ordinary street was made infamous by a legendary visit from the devil.

Old Danish castle immortalized in Shakespeare's Hamlet.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The only surviving piece of Copenhagen's 16th-century defensive wall.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

Copenhagen's celebrated theme park and gardens.

This chimerical bridge/tunnel appears to dead end right into the sea.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

A hidden medieval crypt where a famous legend says the devil used to teach black magic.