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.

This black shoreline is made up of exploded lava particles.

This vast and otherworldly landscape is one of the largest dune complexes in North America.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

Headquarters of the legendary clairvoyant's readings, spiritual hospital, and massage school.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

Eastern Canada's ocean playground.

Oversized statues are just the tip of this nostalgic Americana roadside attraction.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

The state bird of New Mexico, constructed entirely out of garbage.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This is one really big nut.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

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

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A motel dedicated to Southwestern nostalgia.

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

The biggest solar telescope in the world helps reveal the secrets of our sun.