A castle built for love, and abandoned due to heartbreak.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

Practice your Dirty Dancing lifts in the manmade lake where Johnny Castle himself did.

A museum celebrating rare American motorcycles where everything runs—and none of it quietly.

This church on a Tohono O'Odham reservation has stood since 1797.

The biggest solar telescope in the world helps reveal the secrets of our sun.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The first Russian Orthodox church in North America and an Alaskan landmark.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The easiest way to the highest point in Wyoming is only accessible via one hefty fee.

A 6-mile-long lake created by an apocalyptic seismic event and the deadly chain reaction that ensued.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

The first declared National Monument in the United States.

Just a man taking his prehistoric pet for a stroll.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

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

This 19th century granite fortification is one of the most well preserved forts in New England.

The first bridge observation tower in the U.S. offers one of the best views of Maine.