These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

Collective made up of artists, musicians, and activists.

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

This feline raises a friendly paw at drivers barreling toward the freeway.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

The first bell ever cast in Boston was cast by Paul Revere...and sounded terrible.

An enormous image of Utah's salt flats made entirely from tape.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

The remains of a ruined mansion memorialize the 1906 earthquake.

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

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

One of the largest helium balloons in the U.S. is a 112-foot ginormous orange.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

Museum mostly in name, and only a restaurant depending on the day, this place could only exist in Marfa.

An exquisite grouping of structures made from 10 tons of invasive saplings.

DIY collection of eclectic holdings.

A time-capsule monument reminding future generations of the importance of efficient and effective use of natural resources.

These half-buried combine harvesters just off Route 66 are an homage to the Cadillac Ranch.

A serene garden path lined with 36 haiku stamped into clay stones.

A sprawling collection of over 106,000 toys from around the world.

Site of a former hidden treehouse in New Orleans.

The only rotating bar in New Orleans has been slowly spinning since 1949.