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

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

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

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

What remains of the summer palace of King Kamehameha III.

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

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

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

Where a guard killed nine German prisoners during one of the worst 20th-century POW camp massacres in U.S. history.

A Mars simulation in the southern Utah desert.

This quiet park's strange sedimentary spires were named after Kodak's color film.

A huge musical instrument played by the ocean.

Step into the cool deep past and unknown future of who begat who.

Dig for your own trilobites in this goldmine of invertebrates.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

An amazing collection of model trains, collectibles, and artifacts that span the last 100 years.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

An off-the-beaten path cave with an underground lake.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

Legend says train robbers stashed their gold within the depths of this unusual cave.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

A natural history wunderkammer in the middle of the desert.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.