Stockholm's deepest subway station is also a stunning ecological wonder.

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

This irregularly shaped sea fortress has defended not one but three different sovereign states.

This church also serves as a lighthouse complete with a beacon.

An abstract monument to a symphonic composer.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

A subterranean house of worship carved right out of the bedrock.

An alien church provides much needed silence in the midst of a Finland shopping center.

Model Trains and Much More in Hamburg.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Tiny memorials honor individual victims of the Holocaust.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

The only rotating bar in New Orleans has been slowly spinning since 1949.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

Known as one of America's most beautiful public restrooms.

The world's tallest statue of an American hero.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

A view-altering observatory at the University of Texas.

This small stone building, the final work of a renowned artist, offers a peaceful environment with radiant, colorful glass windows .

Continuing the tradition of the dime museum in style.