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

This hollowed salt dome is the largest oil storage facility in the world, hoarding 250 million barrels of crude oil.

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

An emerald-green grotto just a short trip from Austin.

Austin’s nonprofit-run graffiti park where street art is meant to be painted over.

Austin’s local mountain isn’t really a mountain at all.

Roadside Americana, fairy tale characters, and Austin quirkiness come together at this magical course in the heart of Texas' capital city.

Controversially claiming the title of world's biggest bass drum, UT's Big Bertha was once made radioactive by the Manhattan Project.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

A free, canine-friendly alternative watering hole near the more famous Barton Springs.

This massive oak tree has ties to the first native tribes of the region and the founders of Texas.

A high-octane shrine to the greatest Texans who ever lived.

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

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

A small island hides in plain sight on Austin's Lady Bird Lake.

Some islands... they come, they go, especially on Lake Travis.

Life's work of sculptor Elisabet Ney remains preserved in her last studio.

Turning night into day in Victorian-era Austin to thwart a serial killer.

A grove of colossal man-made flowers built to collect the sun's rays.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

One part antique store, one part curiosities hodge-podge.

Continuing the tradition of the dime museum in style.

Free public park and gardens filled with peacocks and peahens.