A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

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

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

A retired firefighter created this contraption so he and his family wouldn't die if accidentally buried alive.

The famous author's cottage hideaway.

Ruins of a Carnegie family mansion on Cumberland Island.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

An eerie, decaying ghost town destined to fade into the forest.

The remains of a ruined mansion memorialize the 1906 earthquake.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

A medieval castle in the middle of rural Texas.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

This abandoned prison castle has become an imposing gallery of graffiti art.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.