This lonely rock along a gravel road outside of the southern Swedish village of Eksjö reminds us of a dark chapter in Swedish post-war history.

This patch of land is home to Sweden's largest burial mound, allegedly belonging to a mythical king.

This railroad track was so secretive that it was omitted from all maps.

This statue, deep in a Swedish forest, is all alone, just like the renowned recluse would have wanted.

A memorial to a Swedish hockey player's "encounter" with aliens.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

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

Said to be one of Sweden's most haunted places, this vicarage once even attracted a ghost-busting priest.

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

It houses the remains of a 17th-century version of the Titanic.

One of the best collections of wax anatomical models in the world.

One man's little-known private clock museum hides inside a historic farmhouse, set amidst the Austrian countryside.

Devilish masks, handicrafts, and pieces of old buildings create a snapshot of life in a historic Alpine region.

A history of heat is on display at this unique Austrian museum.

The Habsburgs' royal collections of art and wonders.

Where beer lovers can literally immerse themselves in beer.

The world's largest private telescope collection hides in a secret wing of a Dutch auto museum.

A rare double mill nestled along the banks of the Aa river.

This Dutch art piece became a Russian icon.

The place where houses are born.

The tallest waterfall in the Netherlands is a lovely, stepped feature that is only 50 feet tall.

A true Valhalla for cactus and succulent lovers.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.