A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

The northernmost international land border crossing in the United States.

Impressive artifacts from Juneau's gold mining days fill this mining site-turned-museum.

A giant poultry statue immortalizes one of Alaska's more humorous town names.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

Colorful lights and mirror-like brine pools create trippy illusions within the historic mine.

The unusual lighthouse looms over waves of prairies with no sea in sight.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

The hellish conditions of this abandoned mine that snakes beneath the Pacific Ocean gave it its diabolic name.

The eerie ruins of an isolated abandoned town nicknamed "the Widowmaker" for its deadly gold mine.

The “City of Stairs” sits high in the Andes, above the world’s largest underground copper mine.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

Massive mounds of golden sand look like a desert landscape randomly plopped in an Arctic forest.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

An abandoned Soviet-era mining town in the mountains of South Kazakhstan.

Abandoned tunnels dug for the once-thriving sea salt industry on the coast of southern Spain.

Cougar Annie earned her nickname after shooting 60 cougars over the years as well as 80 black bears who threatened her garden.