One person's lost luggage is another person's treasure.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

A dilapidated dock tells the story of Titanic's missed arrival.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A heavenly experience, right here on Terra Firma.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

An homage to everyone's favorite prehistoric cartoon family.

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

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A beautiful geyser under environmental threat.

Beyond being incredibly fun, not much can be said about the Hole with certitude.

Venue for strange sideshow displays and musical acts.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

A winding path built in secret on the edge of the continent.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Home of an evil witch famous within southern folklore.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Stroll through a wonderland of stupendous moss-covered trees.