Geology in Texas

An immense cave that has served as an outlaw's treasure trove, an underground dance hall, a nuclear fallout shelter, and much more.

In Parr Park, thousands of painted rocks line this walking trail.

Beauty and history abound in this remote West Texas canyon.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.

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

Over 100 million years ago, beach-bound dinosaurs left permanent marks on San Antonio's landscape.

This former Texas landfill is flush with 300 million-year-old fossils, all fit for the taking.

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

The Grand Canyon of Texas.

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

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

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

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

A small "palace" and museum made of, and devoted entirely, to salt.