The world's only above water sand volcano, believed to once be the bathtub of a priest.

A section of destroyed vertical lift bridge stands alone in the Peene river.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

The Swedish flag over this small naval fort signals that the nation is at peace.

At low tide, you can see the remains of a 17th-century ship just off a Stockholm island.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

Stockholm's narrowest alley is barely over two feet wide.

A wooden street sign is the last remnant of this 400-year-old alleyway.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

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

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

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

The cheese slicer may be a Norwegian invention, but the biggest ones in the world are found in Sweden.

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

Few remain of these distinctive old trees that once served as natural landmarks for travelers on the road.

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

The gnarled remains of an exploded German bunker from World War II sit along a breathtaking fjord.

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

The great polar explorer is remembered in this far northern town, where he embarked on his final expedition.

The world's most charming instant portrait studio also happens to be its smallest.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

Norway has built what may be the world's most beautiful public toilet.