These spooky and unusual stone formations create an underworldly landscape.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

A long-disputed lighthouse built on the wrong side of a Finnish/Swedish island.

"Only the dead get off at Kymlinge."

For a couple of months each year this Swedish city turns into a festive neon phantasmagoria.

Frequent fliers welcome in this airplane hotel.

Swedish skyscraper with a 90° twist.

A peat bog in southern Sweden provides a cozy and photogenic home for junked Volvos, Saabs, and the occasional American muscle car.

The remains of Alfred Nobel's first nitroglycerine factory can still be found on the shores of a Swedish bay.

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

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

This Stockholm light tower can be controlled by anyone with a smartphone.

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

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

The world's first ice hotel is still one of the most elaborate and beautiful.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

The "dragon babies" of southeastern Europe.

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

This massive subterranean fissure is known as the "underground Grand Canyon."

This one-time health resort was used by aristocrats around the world.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

A unique hotel for the artistic soul.