Otherworldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

California's oldest wind harp represents a historic piece of America's Danish history.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

This abandoned factory on the Hudson River once churned out a million bricks a week.

This Maine bridge may be the last wire-supported bridge of its type in the world.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

What happens here stays here – unless it affects the whole world.

A tree grown from astronaut seeds which were exposed to cosmic rays.

Stumps of an Ice Age forest, visible only at low tide.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

A Roman-style column in Oregon hides a spiral staircase inside.

A rainbow-colored house promotes LGBTQ rights across the street from the Westboro Baptist Church.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

Made famous by cable TV, this oddball collection of antiques and collectibles is a cut above the rest.

Feeding hungry Ballard boat workers since 1922.

A quirky Poe-themed joint on an island keen to celebrate its overlooked connection to the famous writer.

A house turned museum is the real-life "home" of the fictional main character of The Wizard of Oz.

Gambling, boozing, and yodeling animals cover the walls of this dive bar cum natural history museum.

This Central New York ghost town was once a prosperous railroad community.

4,000 monkeys used for medical testing on an island off of South Carolina.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.