This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

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

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

The highest peak in the state of Vermont has some interesting features.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

A tunnel with windows, so you don't miss out on the impressive views.

The fifth-longest natural arch in the world, and the longest outside China.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A fitting attraction for the corn capital of the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

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

This beloved marketplace mascot poops money and grants good luck.

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

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

10,000 flowered plants bloom in the City of Roses.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

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

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The "Seinfeld" diner.