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

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

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

This grubby wall is said to be one of the Earth's esoteric energy centers.

Legend holds that this knife serves as a chilling reminder of the deadly rivalry between two local builder brothers.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Metro station with a claim to rock n' roll fame.

A monument to the man who almost killed Hitler.

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

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

This beloved roadside attraction welcomes visitors with his signature neon smile.

The colossal cartoon man stands outside a Nevada museum.

What began as a prominent Burning Man art piece is now an iconic symbol of downtown Reno.

The arch that celebrated the completion of the Lincoln and Victory highways.

An iconic 1960s theater with a Buckminster Fuller-style geodesic dome.

The ruins of a town wiped out by the second-largest earthquake in recorded history.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

A quirky roadside sign was the subject of a years-long legal standoff over highway right-of-way clearances.