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

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

One of the largest private collections of fossils in the world.

Hidden behind Lincoln's head is a chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

This towering wooden Sasquatch was carved with a chainsaw.

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

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

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

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

Seth Bullock, the sheriff of Deadwood, built this town immediately after Teddy Roosevelt’s death in 1919.

A cemetery housing wild west legends in South Dakota.

Before its closure in 2002, this South Dakota mine was the largest and deepest gold mine in Western Hemisphere.

This record-setting hydraulic dam in the Montana badlands was one of FDR's most ambitious public works.

This more than a century-old cathedral has seen its fair share of redesigns over the years.

This Art Deco landmark claims to be the longest bridge over the shortest span of water in the world.

The world’s first museum dedicated to exploring human rights unleashed a wave of controversy.

Fort Garry was a pivotal post for the Hudson’s Bay Company and a major factor in the economy and political culture of the area.

A marvel of engineering built to prevent annual floods from devastating the city of Winnipeg.

The intense competition of the 19th-century fur trading industry played out at this fort in Western Canada.

Canada's accused-traitor-turned-folk-hero is buried under a red stone in a ring of his own.

A statue in a Canadian zoo remembers the WWI origins of the beloved character Winnie-the-Pooh.

Home to a 26-foot-tall statue of an American icon.

Nicknamed the "Grand Canyon of the North," this open-pit mine in Minnesota has a much shorter history.

An abandoned bus station transformed into a museum dedicated to the history of Greyhound Lines, in the place where it all began.