A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

The remnants of a failed socialist commune can still be found just off a California highway.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Decommissioned experimental solar facilities that pioneered solar energy technology.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.

One of the only known surviving coconut palm trees in the entire state.

The exterior of this home was used for the hit television show, The Brady Bunch.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The artwork that Italians felt California didn't deserve.

This house turned museum chronicles the life and work of Richard Neutra.

These murals stand as reminders to the troubled history of this Northern Ireland city.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

Pop culture has helped to keep this iconic British building from being destroyed.

One part local history, 99 parts gruesome haunted house.

Famously misunderstood wonder of the ancient world

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Breathtaking and huge 430 year old maps of Italy.

A contemporary art installation housed within a Gothic cathedral.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.