Liechtenstein's royal family calls this medieval alpine castle home.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

Dynastic Home of the De Piro Family.

This abandoned Brutalist treehouse is a hidden architectural relic.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The San Marino-Rimini railroad was short-lived but this tunnel once provided shelter for hundreds of refugees during World War II.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

According to legend, this structure was inspired by the Tower of Babel and built in a 19th-century industrialist's yard so he could walk his dogs without leaving home.

This collection of Dwarf beech trees were once believed to be enchanted trolls in disguise.

This statue standing near Sweden's southernmost point was based on the grandmother of a modern movie star.

Sweden's southernmost point is located in this charming fishing village.

Enigmatic bug-like sculptures mystify drivers along a Swedish highway.

This century-old independent movie theater with an iconic Art Deco neon sign survived a devastating fire in 2016.

This cemetery holds the remains of an accused witch and the man that ensured her freedom.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

The Swiss hilltop housed an early 20th-century vegetarian nudist colony.

The world's longest and deepest train tunnel.

Four alabaster giants contemplate the tides on the shore of Denmark.

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.

A fortified palace in the shape of a ship on the Thiou river.

From a distance, this structure looks like an ordinary office building but a closer inspection reveals a unique facade.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

A former suicide bridge is now accumulating symbols of love instead of a body count.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.