An artsy hidden staircase leads to breathtaking views of San Francisco.

The legendary building that needed ghostly approval before being built.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

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

These boots are made for selfies.

A grove of colossal man-made flowers built to collect the sun's rays.

One part antique store, one part curiosities hodge-podge.

A modernist landscape of water and sci-fi concrete.

A trio of colossal statues spread across a Dallas neighborhood chart the emergence of a giant robot born of a locomotive and spilled gin.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

This museum glorifies the humble potato.

Half-size replica of the Taj Mahal.