The narrowest street in the world is in danger of closing up entirely.

This historic little railroad runs through some of the most beautiful scenery in Germany.

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

A former Nazi lookout tower with a magnificent view of the Rhineland.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

The abandoned mine where American troops discovered a treasure trove of art and artifacts hidden by the Nazis.

At this unusual park, domes, ladders, chairs, and more are made from trees.

An amusement park on the grounds of an unused nuclear power plant, with a swing ride inside the cooling tower.

The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

A restaurant and observation deck built in a unique broadcasting antenna.

The prototype for all Nazi concentration camps.

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

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

The resting place of 18th century German mummies.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

In 1830, cemetery workers in Cham unearthed a chamber housing thousands of skeletal remains from the 13th century, which can still be viewed today.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

In this truly magical place, rent hasn't been raised since the year 1520.