This working class sculpture pounds his hammer all the livelong day.

A wall of chewing gum moonlights as collective art.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

The arch that celebrated the completion of the Lincoln and Victory highways.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A research lab and hands-on museum where visitors can experiment with retro technology.

Beer lover's can-covered house.

A health museum containing a 27’’½-foot intestine.

The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.

Once seen as a bit of an eyesore, this sculpture has become a staple of downtown Houston.

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

In Houston's airport, a cow is properly equipped to jump over the moon.

The only airport with a people mover system designed by Walt Disney Imagineering.

This small park features a monumental fountain wall, providing a great photo opportunity in the middle of Houston.

255 feet of suds, scrubbers, and blow dryers.

Dedicated to the deadliest aviation accidents on Canadian soil.

The tiny airport in remote Newfoundland that inspired a hit musical is also a modernist architectural gem.