An underground magnet for ever-changing street art.

Mai Tais and Navy Grog served up in one of the original tiki bars.

The first integrated firehouse in Atlanta houses a museum on the history of desegregation in the city's fire department.

This Garden District mansion was built to be bigger and grander than its original owner's former partner turned rival.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

Parts of the civil rights movement unfolded in this historic eatery, helmed by the "Queen of Creole Cuisine."

The entire history of the U.S. Space Shuttle Program is painted on an enormous roadside water tank.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

The state bird of New Mexico, constructed entirely out of garbage.

This 47-foot chile pepper sculpture welcomes Scoville heat unit obsessed tourists to the Big Chile Inn.

This old army installation has worn many hats throughout its history.

This is one really big nut.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

This site honors the end of a 100-year boundary dispute between the United States and Mexico—all started by a river's shifting course.

The final resting place of the great navigator, or maybe his brother.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

A cabinet of curious mathematical models and old calculators.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

The oldest continuously occupied public building in the United States.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.