Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

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

Locals call this magical moss-covered walkway the "Emerald Path."

Strange red rock formations that have been attributed to a higher power for hundreds of years.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

This massive home was constructed by one of the greatest conservationists in Colorado history.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

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

Bizarre Cavern.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

This former fire tower found new life as a communications hub complete with a scenic overlook.

An abandoned coal mine reached by a steep hike.

A melancholy guardian doubles as a judicious godmother to this small town cemetery.

This abandoned mine and power plant was built atop land once given to Revolutionary War soldiers.

The isolated final resting place for perished coal miners.

A well-preserved relic of the industrial age steel and iron works that dotted West Virginia.

The highest point in Maryland is only accessible by hiking through another state.

The remains of one of the last mining camps developed on the New River.

A cult archaeology conspiracy theory claims these West Virginia petroglyphs were written by Irish monks in Ogham.

This California artist's front yard acts as a gallery for his unique, scrap metal animal sculptures.

Home of a 28-foot tall stalagmite known as the War Club.