Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The show's fictional Korean medical camp was created in the Santa Monica hills.

This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The biggest drug trafficking passage between Mexico and the U.S.

The world's tallest statue of an American hero.

Belly up to the bar in Cowtown, don't forget to buy some boots.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

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

The fairy tale castle of the "fairy-tale king."

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

The "Seinfeld" diner.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Try not to get slimed in Tribeca.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

This former monument to an invented Iraqi victory was turned into a military camp during the subsequent invasion.

A giant bisected onion dome remembers the Iraqis who died in the Iran-Iraq War.