This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

A castle built for love, and abandoned due to heartbreak.

Amateur taxidermy museum known for its large collection of white squirrels.

More than 5,000 contemporary and "historic" mustards from around the world.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

A picture-perfect town, perfect for blowing up.

Michael Heizer's masterwork in the Nevada Basin.

The longest living non-clonal organisms on Earth.