Canyon walls shrouded in ferns.

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

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

Where manatees are the snowbird vacationers in these balmy Florida springs.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A lush green oasis in the middle of Chicago.

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

Where beautiful signs live on forever.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

A beautiful geyser under environmental threat.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

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

A psychedelic labyrinth on the San Francisco bay.

Rippling sand dunes frozen in the Arizona rock.

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

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

The largest permanent Monopoly board makes one of the longest games even bigger.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

An underwater city for the dead.

A museum dedicated to the history and exploration of both popular music and science fiction.