Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

The largest earthwork effigy in the world.

The site of Neil Armstrong's first flight is marked by a full on replica of the moon landers.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

It took more than 20 years and a sharp eye for one man to assemble this quirky collection.

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum dedicated to the alleged Roswell Incident.

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

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

In an odd geographic anomaly this city borders two different states on opposite sides of town.

This university transit system is a 1970's vision of the future.

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The first declared National Monument in the United States.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Washington's iconic carousel has a nice piece of Civil Rights history.