Known as the "Hobbit Houses," these storybook homes look like they're straight out of the Shire.

The shortest river in America flows for just 201 feet.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

An impressive collection of farm equipment and other artifacts from life on the prairie.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

Every president in history is immortalized in bronze in downtown Rapid City.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

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

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

The ghost town that ended up on Ebay.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

The ghostly remains of an accidental sea.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

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

An homage to everyone's favorite prehistoric cartoon family.