The only structure in a remote mountain pass, these colorful cubes are visible from miles away.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

An isolated, rusty phone booth commemorates Iceland's first international telegraph cable.

These concrete domes were installed on an Icelandic bluff to honor a very specific musical tradion.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

This wild explosion of color on a disused water tower tells the whimsical tale of a curious puffin.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Cold war icon and onetime "hole" in the iron curtain.

A fascinating insight into daily life in the Eastern Bloc.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

The site where a plot to assassinate Hitler was planned—and its conspirators were executed—is now a powerful memorial to the German resistance during World War II.

This watchtower once presided over the Berlin Wall.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

A historic fire call point.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.