Two small markers remember the Alamo's feline protectors.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The largest island on the great salt lake is home to curious creatures and strange stories.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

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

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A huge musical instrument played by the ocean.

A massive sea stack famous for its appearance in The Goonies.

The oldest restaurant in Portland serves fiery coffee cocktails and an astounding amount of turkey.

This garden is dedicated to a Portland cartoonist who specialized in dark humor.

A sculpture of a salmon swimming through a brick building.

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

These unusual rooms on wheels are holdovers from the 1960s.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This historic, one-acre island is the only legal place to camp in the city of Richmond.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

At 207 feet, one of the world's longest continuous escalators.