A century-old miner's quarters turned mansion.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

No one messes with the Massachusetts sacred cod, not this time...

These items are all that remain from the room used by the author during his second tour of the U.S.

This massive redwood tree has a hole in the base big enough to drive through.

Only known mainland rookery of the threatened Stellar sea lion.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

This extinct shield volcano is the lightning rod of the Cascades.

This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

A public fountain that spouts "health water" from a nearby spring.

A botanic garden full of trees twisted into fantastic shapes and positions.

This natural marble cave is one of only five national monuments in Oregon.

A chance to sleep among the firs and pines of the Oregon forest.

Treehouse motel and treehouse-building school.

This historic steamboat is scuttled just a few hundred feet from where it was built over a hundred years ago.

A natural dome made of volcanic glass in Inyo National Forest.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

The set location for a 1987 cult classic draws international film buffs to the middle of the Mojave Desert.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

This unique graffiti art from the 1940s has become a staple of this local landscape in the remote California desert.

In this roadside "community for the small," abandoned toys gain new lives.

A regular looking rock with an unbelievable history.