Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The abandoned tuberculosis sanatorium is said to be one of the most haunted places in Canada.

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.

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

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

This notorious Canadian mental institution was home to some of the first LSD experiments and origin of the word "psychedelic."

The crumbling structure is a rare surviving relic of the area's bygone mining industry.

This small museum is home to some of the oldest and best-preserved dinosaur specimens found in Montana.

An outcropping plays host to the largest collection of pre-contact petroglyphs in Saskatchewan.

This monument remembers one of the manliest men of the frontier who fought a grizzly before dragging himself 200 miles to safety.

An entire city block built completely out of petrified wood.

The oldest still-existing mosque in the United States sits in a remote prairie in North Dakota.

One man's quest to save his town with a trail of record-breaking sculptures.

Peru's (not so) mysterious carved stones.

This geodesic gallery holds a collection of painted spheres that make traditional canvases look lazy by comparison.