A natural gas leak provides a flickering flame beneath a waterfall.

A downtown park built on top of unclaimed graves.

An homage to everyone's favorite prehistoric cartoon family.

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

The largest historic preservation organization in the United States.

Exact replica of the ancient monument, but much, much lighter.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

Elevated freight railway turned wildly successful urban park.

A motel dedicated to Southwestern nostalgia.

More than 5,000 contemporary and "historic" mustards from around the world.

A bypass decorated with large wooden troll carvings.

A bizarre house filled with an astounding array of collections.

A large circus museum with summer performances.

Eternal resting place of the grave robber and murderer who served as inspiration for many of cinema’s famous madmen.

The home of 1.5 million wood letters for printing is still a functioning workshop.

A house and yard adorned with bizarre concrete sculptures in a Milwaukee suburb.

A place to eat for on-the-run agents and espionage enthusiasts.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

You were once able to challenge a chicken to tic-tac-toe at this park, which is now converted into the Aikman Wildlife Adventure.

These pretty kitties killed and ate as many as 135 railway workers.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Home to a protest movement, a bombing, and a dramatic change in labor history.

A terrific purveyor of natural history objects and curios.

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