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

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.

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

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

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

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

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

The first declared National Monument in the United States.

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

A town honors its legacy of traditional American Indian pipe carving with one gigantic pipe.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

A huge musical instrument played by the ocean.

A modern mechanical planetary system, part of a 10,000 year clock.

The oldest house in the capital of Silicon Valley.

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

Three plaques mark the spot where the "forgotten father of broadcasting" worked.

For roadside fast food, pull over at the giant orange.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

A museum, walk-through diorama, and library nestled under one castle-like roof.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

Oldest building in California still in use.

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.