One man's unrequited love stands in a glass box forever.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Less a museum than a bizarre fantasy world created by artists and engineers.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

A floating museum that was sunk by a flood and left to rot in the tides.

The eccentric and colorful pavilions of Tower Grove park are a beloved and overlooked symbol. 

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

Spiral labyrinth hidden in the hills above Oakland, CA.

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

A hidden subterranean installation offers a view of the sky.

Playable, historic pinball machines fill this Alameda museum.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

This odd California folly seems like it was almost designed to accumulate urban legends.