This mysterious, medieval cathedral remains unbuilt but fiercely protected.

Located more than 600 feet beneath the North Atlantic seabed, this tunnel boasts the world's first undersea roundabout.

Micro-nation based around a nine-story high illegally built tower.

Designed to honor the birthplace of Buddha.

As the highest point in the Mid-Atlantic range this stratovolcano offers spectacular views.

The best place in the world to buy tinned fish.

One of the smallest bookstores on the planet.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Bits of flat terrain surrounded by cliffs make one of the most beautiful landscapes in the Azores.

This abandoned five-star hotel is now a five-star urban exploration destination.

A 19th-century mansion houses the largest collection of gin in the European Union.

Europe's oldest still-operational tea farm also boasts a spectacular view.

This Norwegian satellite station provides ground services to more satellites than any other facility in the world.

The world's northernmost brewery uses water from a 2,000-year-old glacier to create its beer.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

This Arctic mining town is home to a cat that's spent years masquerading as a fox.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

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

A beautiful Arctic museum and nature center preserves the culture of the Sámi people.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

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