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

This legendary urban waterfall creates a dazzling display of rainbows.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

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

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 black shoreline is made up of exploded lava particles.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

A true treehouse near Hawai'i Volcanoes National Park.

This mom-and-pop Japanese sweets shop has been serving cloud-light mochi for almost a century.

A historic cemetery with unique artwork, a Civil War fort, and also happens to be the site of the Battle of Bladensburg.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

This isolated community does not want you to visit.

A hidden alley in urban Baltimore is a haven for graffiti artists.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

The trials and tribulations of marking Poe's grave.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Two dozen pinball games hidden away inside a most unlikely location.