Some of the tallest ancient American ruins continue to inspire awe and curiosity.

This church on a Tohono O'Odham reservation has stood since 1797.

Single runway interrupted by a busy road that cuts across its middle.

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

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

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

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

Hawai'i Volcanoes National Park is home to one of Polynesia’s largest petroglyph fields.

A priest with no formal artistic training used basic house paint to create gorgeous religious scenes inside this historic church.

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

A controversial memorial at the place where Captain Cook met his violent end.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

Submerged lava formations create incredible waterworks.

Water of undetermined depth has attracted rare fish and cult leaders alike.

Marta Becket's hand-painted theater in the desert.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Colorful sedimentary rock layers provide opportunities both for hiking and photography.

In one of the hottest parts of the Mojave Desert, shallow bedrock forces the typically dry Mojave River to the surface in this canyon, providing a vital oasis for humans and wildlife.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

An improbable set of attractive limestone caverns forms the centerpiece of Providence Mountains State Recreation Area, in the heart of the Mojave Desert.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.