The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

An Old West film set seen in countless TV shows and movies is open for the public to explore.

Stroll the grounds built by murder, suicide, and dirty oil money at one of Hollywood's most filmed mansions.

This NASA test station is home to some of the world’s largest and most powerful space environment simulation facilities.

A miniature train theme park, free to the public, laying at the base of the Santa Monica Mountains.

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 innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

Perhaps the most scandalous statue of America's first president.

Known as "The Dome" this is the world's largest open air geodesic dome.

This stuffed pigeon of war had the very serious name "John Silver" until he lost a leg in battle.

Known locally as "the giant head," this 14-foot LED sculpture has a photo booth in the neck where you can have a 3D picture taken and displayed.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

The first piece of public art dedicated to LGBT rights.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Visit the monolithic tomb of America's most famous general.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

New York City's smallest piece of private property.

Elevated freight railway turned wildly successful urban park.

This small plaza encourages people diagnosed with cancer to never give up hope.

Bison, America's national mammal, are staging a slow comeback in Ohio's prairie parkland.

Rare recess caves fill this unbelievably beautiful Ohio park.

Where beautiful signs live on forever.