Train debris from the deadliest avalanche in United States history can still be found in the ravine where so many perished.

An outsider art duo's yard has been turned into a whimsical public gallery.

This medieval village/restaurant perpetually celebrates the year 1376.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

An homage to everyone's favorite prehistoric cartoon family.

An emerald-green grotto just a short trip from Austin.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

This naturally-sourced hot spring is now home to a clothing-optional resort.

Abandoned silver mine strewn with wrecked and twisted structures.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

This abandoned amusement park was built on a site with a dark history.

A forgotten sea village stands silent after hurricanes deemed it obsolete.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

A sculptor's dream castle turned fantastical ruin.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

When this test site was abandoned, they didn't even bother to take the rocket with them.

Ruins of a Carnegie family mansion on Cumberland Island.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

A secret, rocky playground hidden amongst the plain white beaches of the Florida coast.