The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

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

A 140-year-old castle with underground caves hidden in San Francisco.

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

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

World's largest collection of serial killer artwork and other macabre exhibits.

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

The clock that sets them all.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A river runs through this remote valley in a very unexpected way.

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

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

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

The mysterious round rocks of Schooner Gulch.

The drama of nature in full effect in this Nevada State Park.

Water of undetermined depth has attracted rare fish and cult leaders alike.

Some of the Old West's most notorious outlaws frequented this mining town.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

World's largest collection devoted to one fruit.

Huge otherworldly domed rocks on the shore of a deadly lake.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

These unusual houses look like giant boats that washed ashore on a residential street.

This unique sanctuary invites you to interact with the beautiful birds.