"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

The final resting place of a space program monolith, soon to be unveiled again to the public.

A hand-built folk art installation covered with messages of God's love.

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

A giant chess set, minus the psychedelic drug trip.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

Oakland's beautiful monumental cemetery.

San Francisco Bay's ghost town.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

The seamy, underground secrets of Portland's criminal past.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

The largest permanent Monopoly board makes one of the longest games even bigger.

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

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

America's most famous piece of self-built architecture.

Remains of a Greek freighter trapped off of Rocky Point in 1961.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

This sandstone mansion was the home of two of Oregon's most important pioneers.

This giant steer-skull edifice refuses to die.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.