Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

This mural pays tribute to Atlanta natives and hip hop legends Andre 3000 and Big Boi, better known as OutKast.

Meet 'Big Josh,' the 20-foot-tall muffler man.

A wall of chewing gum moonlights as collective art.

The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

Ride a mechanical corn dog at the alleged birthplace of America's favorite deep-fried wiener.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

A 131-year-old wunderkammer of Texas history.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

After 97 years of constant vigilance from the dome of the Texas State Capitol, the original Goddess of Liberty retired to a life of climate-controlled leisure.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Continuing the tradition of the dime museum in style.

Beauty and history abound in this remote West Texas canyon.

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.

Multiple waterfalls and several historic CCC buildings anchor this state park in Oregon's Willamette Valley.

Three hundred years of preserved Spanish colonial history in San Antonio.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

These boots are made for selfies.

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

For over 75 years, this cute stone statue has warmed the hearts of San Antonio.

Once called the Jersey Lilly, this former saloon was the domain of infamous Judge Roy Bean.

Amtrak's least-used stop in the entire country sits in a tiny West Texas town.