The center of the only hemisphere that awards visitors with a commemorative coin.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

The former home of the hard partying literary power couple is now one of the only museums devoted to their story.

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

This scenic gorge is named after one of the most famous Bigfoot attacks in pseudohistory.

The remnants of an early American attempt at missile defense.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

It's a pretty creepy lock-up.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

The arboretum whose marshy soil sucked up the dreams of housing developers.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

A tourist attraction founded around a slumping cabin.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.