One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The "lovely red Vega" of the legendary record-settling pilot.

The most accurate timepiece in the world.

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

Largest Roman Catholic church in North America.

The national park was once a plantation estate.

The site of the climactic scene from the classic horror film is now a historic landmark.

"We Seceded Where Others Failed."

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

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

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Enormous lake at the bottom of a unique cave system.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Crumbling pink walls and murder memorials preserve the pioneer history of Joshua Tree.

These lush botanical gardens employ the most purrfect pest control force.