A giant "X" symbolizes the blood spilled from the brutal Juárez drug wars.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

An acoustic anomaly with a mysterious cause.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

This former Union fort commands a fine view of downtown Cape Girardeau and the Mississippi River.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

A chessmaster's dream destination.

A half-size replica of the World Trade Center towers above Tulsa.