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

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

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

One of the largest trees of its kind in California.

San Diego's most historic and haunted home.

It would be a crime to miss it.

An ode to the friendship between four Pacific Rim countries.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

An 18th-century Spanish watchtower made entirely of seashell and concrete.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

It's a pretty creepy lock-up.

St. Augustine's record-setting narrow street was designed to protect against pirates.

A tribute to Ponce de Leon's supposed quest for eternal youth.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

This relatively recently abandoned brewery is a tragic reminder of the continuing effects of Hurricane Katrina.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.