A Danish fisherman spent 25 years covering nearly every inch of his home with tens of thousands of shells as a gift to his wife.

This inverted metropolis model is the artist's "revenge" for not being allowed to have a doll house as a kid.

A spiralling hourglass-shaped tower rises from the forests in Denmark.

Long before ultrasounds and modern testing, medical specimens like these conjoined twins helped physicians learn about congenital anomalies.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

From buck blood to Theriak miracle tonic, this collection of Renaissance chemist's gear look's like a wizard's pantry.

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

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

A public work of art that also provides some relief from the summer heat.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

The Slovenian architect designed many landmarks in the capital city, including his own dream house.

The monument honors the mountaineers who were part of Europe’s best anti-Nazi forces.

This 14th-century monastery survived Turkish raids, Nazi occupation, and even a stint as a spot to store towels.

A cemetery for Slovenian notables also serves as a popular recreation space.

Strange rumors surround the artist who created these solemn metal guard dogs.

A miniature train-ride through Slovenia's largest cave system.

The 19th-century home of Count and Countess von Hallwyl is now a museum.

This wonky bit of historical taxidermy is experiencing a second life online.

This cave at the base of an unusually shaped cliff is said to be inhabited by a mythical forest enchantres from Scandinavian folklore.

A medieval village, with red wooden cottages around a stone church, stands as a well-preserved example of a settlement type that was once common in northern Sweden.

A collection of birches from across Sweden.

A sculpture of three large candles in the middle of the water of the river Smedjeån.

Some clocks inside this museum are more than 500 years old.