One of the world's heaviest musical instruments towers within a popular urban park.

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

This monumental work of art symbolizes the coming together of a previously divided city.

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

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

Art and a pun, all in one.

The most visited, and possibly most controversial, museum in Germany.

Superfans of The Shawshank Redemption can take a driving tour of most of the films real locations.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Thousands of people walk over this fantastic work of art every day, but how many notice it?

One of Frank Lloyd Wright's final works was this UFO church.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

Almost half-way between the Equator and North Pole.