The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

The palatial McDonald's that inspired Wesley Willis.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A display of magnificent stained glass windows is the first exhibit of its kind.

A curious collection of miniatures in a quiet corner of the Chicago Children's Museum.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

These pretty kitties killed and ate as many as 135 railway workers.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

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

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

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

The rogue roots are gradually consuming some of the historic marble grave markers.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

A diorama of the Civil War, fought by cats.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The first memorial dedicated solely to the Black troops who fought for the Union.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.