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

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.

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

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

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The highest bridge in America was built for an almost unnervingly small amount of money.

When ecosystems collide in the arid Southwest.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The largest self-built castle in the U.S., six decades in the making.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

Where the writer penned his famous story about a jumping frog.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Canyon walls shrouded in ferns.

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

On the Oregon coast is a natural hole that seems to be draining the sea.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Five candy-colored villages on the Italian Riviera.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

An enormous and lavish Gothic church in Czechia.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”