A tiny slice shop hides down an unmarked hallway in a Las Vegas casino.

A lush green oasis in the middle of Chicago.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

Single runway interrupted by a busy road that cuts across its middle.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A New York–based physician returned home to Spain to build his own elaborate monument to Christopher Columbus.