This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

Treehouse motel and treehouse-building school.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

The longest living non-clonal organisms on Earth.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

The intriguing personal collection of a professional demon-chaser.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

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

The largest earthwork effigy in the world.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Quite simply the largest tree in the world (by volume).

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The world's longest known cave system.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Take a drunken tour inside the world's largest known geode.

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

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.