Is this 47.7-mile stretch of highway the longest straight road in the United States?

This marker identifies the location where three states converge.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

An eccentric inventor's castle home with its own indoor weather system.

This once-forgotten African American cultural hub was an important stop on the Underground Railroad.

The "world’s largest honky-tonk" also has its own indoor rodeo arena.

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

This strategically-placed fountain creates the magnificent illusion of mustangs galloping across a river.

Texas's oldest bakery serves authentic German pastries, including legendary strudel.

A family of fiberglass giants.

A Texas-sized secondhand bookstore features 54,000 square feet of books, music, and media.

One of the largest Masonic temples in the world, created at the height of the oil boom in ostentatious style.

A museum and apothecary garden devoted to the history of frontier medicine.

Preserving the story of an early 20th-century orphanage.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

A massive underwater sinkhole made famous by Jacques Cousteau.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

A park where people have been going to feed friendly pigeons since the 18th century

This colorful gate stands as an entrance to the walled city of Old San Juan.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This hand-carved wooden carousel in the Story City North Park was built in 1913.

The final resting place of the legendary outlaw.

The oldest purpose-built cinema still in operation also houses a museum of movie memorabilia.