This blowhole is supposedly caused by a trapped monster.

What remains of the summer palace of King Kamehameha III.

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

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

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

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

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

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

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

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

This whimsical stacked cabin looks like something out of a children's book.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

Colorful boxes placed over the dead are left to rot and crumble.

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

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

Permanent exhibit reminds visitors of the Exxon Valdez.

An auroral research program that superheats the ionosphere.

The ruins of this Alaska gold mine form a gorgeous ghost town.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

This shrine to the patron saint of Alaska sits on a small tidal island and was built from the land’s own beach stones.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

This Alaska library may be the only one in the country that allows you to check out pieces of taxidermy.