Submerged lava formations create incredible waterworks.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

This two-room shotgun shack in Tupelo is the birthplace of a King.

This natural marble cave is one of only five national monuments in Oregon.

Where the writer penned his famous story about a jumping frog.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

This 19th century granite fortification is one of the most well preserved forts in New England.

Statue dedicated to the star of an old television show.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

This public space is speckled with the eerie remnants of a defunct amusement park.

The trunks of 3,000 year-old trees lurk beneath the surface of this crystal clear lake in Oregon.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

A true treehouse near Hawai'i Volcanoes National Park.

The fifth-longest natural arch in the world, and the longest outside China.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

Natural rock water slides hidden in the remote forests of northern Idaho.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

Carved faces add a touch of magic to this island's impressive oak trees.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

These ancient sacred grounds granted amnesty to those who managed to reach them.