An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A wonderful and easily overlooked museum tucked in Ohio's Burke Lakefront Airport.

Medical history museum featuring a lovely doctor's office from the 1800s.

Take a drunken tour inside the world's largest known geode.

Dinosaurs invade a suburban Nashville neighborhood.

The site of the one of the most deadly train wrecks in American history.

This replica of the Greek structure is in the heart of Nashville.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Collection of antique science instruments displayed in recreated 1870-1930 laboratories.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

The highest point in Nevada had to be decided by court order after California tried to claim it as their own.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Step inside Lucy, the world's largest "elephant."

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.

Thousands of Matchbox cars spanning generations call this New Jersey barn home.

This Great Depression-era creation was once known as the strangest house in the world.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

See massive fossils that are over 200 million years old in northeastern Arizona.

Florida’s half-sized replica of the Vietnam Veterans Wall.