148 feet long and in the middle of a verdant forest.

Imagine playing a version of Legends of the Hidden Temple, but with a distinctly Southern Gothic flare.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

Dig for your own trilobites in this goldmine of invertebrates.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

The final resting place of a space program monolith.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

The largest drain hole in the world.

A stealthy Apache hideaway that became the haunting site of a mass grave.

Abandoned bridge hidden deep in the San Gabriel Mountains.

A short hike into the mountainside forest reveals a decaying 1890s town.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

A natural gas leak provides a flickering flame beneath a waterfall.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

A 300-ship graveyard, with a few still visible at low tide.

The Boston square dedicated to the dark poet who was born nearby.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."