A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

One street divides a single town that stands in two U.S. states.

An eight-sided home built during a brief octagon craze in the 1850s.

One of the few surviving "Wigwam"-themed motels.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

House built with over 60,000 glass bottles.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

America's post-nuclear-attack chambers of Congress.

Statue dedicated to the star of an old television show.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

A factory in Milwaukee where poop is reclaimed… and recycled.

This abandoned amusement park was built on a site with a dark history.

This dramatic rail curve was once the target of a failed Nazi attack.

The world's largest fully steerable radio telescope.

You thought Santa Claus didn't exist, but it turns out you were wrong.

The world's largest collection of the world's largest objects is in one small Illinois town.

This abandoned Abraham Lincoln statue has also earned the honorary of "World's Ugliest."

A six-story-tall golden pyramid, surrounded by a moat.

The birthplace of a titan of American cinema.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.