This hot dog-shaped diner has moved all around Colorado, never been to New York.

A hot dog stand where the heads are just as hot as the dogs.

The last remaining location of a drive-up hot dog stand named after a local pool shark.

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

One person's lost luggage is another person's treasure.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The world's longest known cave system.

World-famous, Pink's still manages to keep its prized cult fetish status.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

A beautiful geyser under environmental threat.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A one-of-a-kind collection of a unique medium.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Where beautiful signs live on forever.

Sniff the Titan Arum's rotting flesh.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A rare view of a preserved Victorian science museum.

The "Seinfeld" diner.

A dilapidated dock tells the story of Titanic's missed arrival.

The first declared National Monument in the United States.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.