A true treehouse near Hawai'i Volcanoes National Park.

This tiny Hawaiian island is slowly coming back to life after being bombed during naval training exercises.

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

Inside, visitors are treated to the rich history of sugar farming and its impact on Hawaiian society.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

Submerged lava formations create incredible waterworks.

This former luxury resort in Kaua'i is now an abandoned relic.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

This blowhole is supposedly caused by a trapped monster.

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

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.

An ode to one of the first concerts broadcast via satellite.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

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

A Hawaiian stairway to heaven—that you can't climb.

What remains of the summer palace of King Kamehameha III.

The grand marquee of this abandoned Hawaiian theater remembers the building's elegant past.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

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

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.