The taxidermied remains of the "last wild grizzly bear in California" and of the symbol of the state of California.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

A brooding mansion of clinker brick stands out among the Victorian houses of Pacific Heights.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

Gold Rush-era tombstones line the park's paths.

A cow in the road might subvert the flow of traffic but this one's above it all, quite literally.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

A trading post in the North Pole where children send letters.

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

In the 1950s, two women saved this grand theater in the Colorado mountains from demolition.

A surprising collection of bronze faces beneath a bridge in Loveland.

The first railway tunnel to cross the Continental Divide and, at 11,523 feet, was once the highest railroad tunnel in the world.

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

Up-close opportunities to see working birds of prey.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A research lab and hands-on museum where visitors can experiment with retro technology.

Victorian "Fancy Craft" Hair Wreaths and Relics.

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

A technicolor place of worship for Elevationists.

Floor-to-ceiling frescoes by local art students cover the interior of a nearly 200-year-old church.