A graffiti Mecca welcoming artists from around the world.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

Offbeat arts organization that hosts exhibitions, events, and explorations.

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

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

The biggest drug trafficking passage between Mexico and the U.S.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

An unusual bed & breakfast made of papercrete.

Ghost town with a beer-drinking goat for mayor.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

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

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

A museum dedicated to the alleged Roswell Incident.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

A unique geological area spiked with wind-carved rocks that resemble teepees.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A sprawling collection of over 106,000 toys from around the world.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

Mile-long cave system near Great Smoky Mountains.

This structure among the trees was the result of divine inspiration.

Enormous lake at the bottom of a unique cave system.