When ecosystems collide in the arid Southwest.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

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

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Curios, scientific antiques, oddities for sale.

A small store filled with animal skulls and other curiosities.

A home covered with elaborate mosaic and other pieces of art.

It's easy to forget what century it is as you wander this rustic homestead.

A mysterious echo seems to defy the laws of acoustics.

Lake Champlain Bridge, the recently demolished and rebuilt bridge where they filmed "What Lies Beneath".

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This tiny patch of arid sand sits in one of the greenest states in the United States.

The oldest covered railroad bridge still standing in the United States.

Believed by many to be the oldest surviving public monument in the United States.

A long-forgotten Victorian swimming hole is still a fun spot for a dip.

This store also houses a museum dedicated to the history of these small, historic community shops.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

All that remains of the once-booming chain is a single orange-roofed restaurant.

Of all the unique artifacts inside this library, a mummified hand stands out among the others.

Rock face that shares a name with Mary Shelley's famous doctor.

The world’s largest underground marble quarry is hiding in Vermont.

An Adirondacks museum housed in the former studio of Marcella Sembrich, the 19th century opera star most famous for her role of Mimi in "La Boheme."

The New England cabin where an infamous British occultist conducted experiments in "magick".