What remains of the summer palace of King Kamehameha III.

This WWII plane died a quiet death, and is now a garden eel playground.

This unusual lava tube spouts seawater during high surf.

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

Submerged lava formations create incredible waterworks.

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

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The vaulted ceiling is home to a scurry of “squirrelgoyles.”

A 1940's shrine dedicated to drowned fishermen on the outskirts of Honolulu.

Hiding in plane sight.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

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

A unique set of caves that spits waves back out into the ocean.

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

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

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

The site of the climactic scene from the classic horror film is now a historic landmark.

The United States Capitol's former columns still stand.

This grand gothic brewery has been pumping out suds for over a hundred years.

Eighteen miniature death-scene dioramas.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."