These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

These ancient sacred grounds granted amnesty to those who managed to reach them.

The only road through the heart of Glacier National Park.

The oldest badlands in North America, Makoshika State Park takes it name from the Lakota words for broken land.

Home to the deepest rift anywhere on Earth.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.

An entire town preserved as a historic landmark.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

This giant temperature attraction created some giant electric bills.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Home to the "Circus" trees created by Axel Erlandson.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

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

The rusting remains of the largest assembled WWII fleet on the West Coast.

The fossilized remains of ancient California redwoods.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

The haunting ruins of Jack London's dream house.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

The black lab that was voted mayor of a California town is forever remembered by a life-size statue.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.