A hulking remnant of Alaska's industrial gold mining boom in the 1920s.

The collection includes seven one-of-a-kind automobiles, vintage fashion, and more.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

The sculpture's largest spire points directly toward the North Star.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

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

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

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.

Hiding in plane sight.

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

This monument built by Japanese American immigrants spent decades underground.

A unique collection of Western and Japanese-style graves.

This coastal cavern is associated with the Hawaiian god of creation.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

This airstrip atoll is uninhabited by humans, but absolutely full of birds.

Ten acres of the Kula Forest Reserve make up this wondrous state park.

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

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

This ancient Hawaiian henge may have been an early star chart.

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

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

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

This unusual lava tube spouts seawater during high surf.

Submerged lava formations create incredible waterworks.