Most-visited and most-photographed slot canyon in the American Southwest.

The remains of this hell for leather wild west town can still be found in the Arizona desert.

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

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

Its buzzing collection honors vibrator history.

Eclectic collection of dark and macabre antiques.

The largest Star Wars collection in the world is its own galaxy of collectibles.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

Experience Larry Spring's self-taught "common sense" laws of physics.

An optical illusion found amid a logged redwood forest.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

Experience the "opulence, grace, and grandeur of Eureka's most famous Victorian Inn."

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

This little museum has an exhibit devoted to the elusive forest denizens.

Humboldt's human-powered sculptures race across land and sea for days on end in a wacky quest for dominance.

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

Treehouse motel and treehouse-building school.

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

A tourist attraction founded around a slumping cabin.

A vertically floating hemlock controls the waves and weather at Crater Lake.

These ancient sacred grounds granted amnesty to those who managed to reach them.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

A true treehouse near Hawai'i Volcanoes National Park.