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

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

This legendary urban waterfall creates a dazzling display of rainbows.

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

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

A beach made of semi-precious green sand on the Big Island of Hawaiʻi.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

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.

Considered by many to be one of the most dangerous highways in Alaska.

This gravelly, dangerous highway is the only road in the United States that leads to the Arctic Ocean.

At 238 feet above the bottom of a gorge this span is known as the biggest thrill on the road to McCarthy.

Siberian husky that delivered a life-saving antitoxin.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

The stickered marker pinpoints where the only maintained road in the United States crosses into the polar region.

A trading post in the North Pole where children send letters.

The ghostly remains of what was once the world's richest copper mine.

The king of U.S. high points towers over every other peak on the continent.

Some of the best pastries in "the Czech heritage capital of Texas" come from a gas station off I-35.

The saga of the massive nut begins and ends in Texas.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.