The oldest standing structure in downtown San Diego.

This saltwater swimming pool, which is the last of its kind in the United States, is slowly crumbling within sight of multiple high-end beachside hotels.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

A unique set of caves that spits waves back out into the ocean.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

A Hawaiian stairway to heaven—that you can't climb.

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

Traversing these canyons, visitors can take in stunning views and glimpses of the region's history.

At the western edge of Palm Springs, a rugged desert canyon trail leads to a waterfall at the base of the San Jacinto Mountains.

A bust of the entertainer and politician sits in an alcove at the Palm Springs Airport.

This conservation area is also home to many of the region's desert tortoises.

Watch the newest land on the planet form before your eyes.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

Spectacular views await visitors to this lake.

The only road through the heart of Glacier National Park.

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

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

This giant spider sculpture made from the iconic car is one giant visual pun.

Explore the wide world of desert plants at this unique Palm Springs botanical garden.

Instead of faces, these sculptures have barcodes—statements on societal dehumanization.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."