Mining town from the late 1890s, once home to Calamity Jane.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

Built after the 1991 discovery of one of the world's most complete T.rex skeletons in the nearby hills.

Underground tunnels once home to crime are now back open to the public.

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

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

Profile of a sleeping person 4km long in 250m high cliffs.

The world's largest and most outstanding marl lake regularly changes color.

Icelandic settlement in Manitoba established in 1875.

The ruined remains of an early hydroelectric dam.

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

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

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

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

The deserted railroad town had a last gasp as a ghost town attraction before being abandoned for good.

This Wild West attraction is alive with glitching automatons.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

America's silhouette includes 100 square miles of wilderness jutting into Canada thanks to an old mapmaking error.

This Minnesota-shaped forest is actually located in the state it is shaped like.

Half of a waterfall goes into the river while the other half seems to disappear.

Minnesota's highest point is a scenic vista marked by a plaque and armies of mosquitoes.

A haunting army of decomposing, moss-covered stuffed animals and dolls guard this swinging truss.