This massive redwood tree has a hole in the base big enough to drive through.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

This remote river crossing was a popular campground on American westward expansion trails, and a former Pony Express station.

One of America's largest retail chains got its start in one of its most remote rural destinations.

Multiple waterfalls and several historic CCC buildings anchor this state park in Oregon's Willamette Valley.

This maintained cabin is where Josie Morris, an occasional associate of Butch Cassidy, lived out the last 50 years of her life by herself.

This bee-themed family business does more with honey than anyone would think was possible.

Cross the Continental Divide through an old railroad tunnel, and ride back to the top on a shuttle.

Only known mainland rookery of the threatened Stellar sea lion.

Two creeks flow out of either end of this canyon in opposite directions.

This town is home to the world’s largest arch constructed entirely of elk antlers.

These tall, red sandstone pinnacles outside Moab are often forgotten amid their more famous neighbors.

Oddly shaped rock formation, misassociated with a nearby utopian community.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

Two massive rock outcroppings on the Oregon coastline.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

This enigmatic building features numerous architectural styles.

Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

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