A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

A massive volcanic plug is now a protected area that hosts a number of bird species.

The unbelievably opulent home built for an infamous newspaperman.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A remote crossroads honoring a fallen talent.

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

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

Canyon walls shrouded in ferns.

This giant temperature attraction created some giant electric bills.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

Visitors to this public park will also find the ruins of an old western fort.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

This historic national park is covered in the stunning ruins of red rock pueblos.

A stone pillar commemorates the surrender of the extraordinary Apache leader.

Odd outsider art installations surround a Gold Rush-era ghost town.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.