Recycling meets art in this colorful barricade.

An early 20th-century jail not far from the infamous Tombstone, Arizona.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

Ancient human, animal, and geometric figures drawn in the earth.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

This giant steer-skull edifice refuses to die.

The unusual patterns in this rock formation result from two distinct modes of weathering.

After the nearby mercury mine shut down, this town was abandoned and declared a Superfund site.

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A modern frieze of ancient Grecian mythological figures playing a national pastime.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

A classic advertising icon immortalized in regal bronze.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

Furniture tries to escape an abandoned building in San Francisco.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

This historic roadhouse has many tales to tell of San Francisco's early history.

Over a century old, this restored Victorian building is surrounded by a lush garden filled with rare palms.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

The longest and widest floating bridge in the world.

This coastal rock formation resembles a churning cauldron at high tide.