It's been almost 10 years since floodwaters rushed over the Canyon Lake Spillway at more than 67,000 cubic feet per second.
For six weeks, water scoured a path a mile long.
"After the water subsided, we realized we had a true treasure here and we've come to call it Canyon Lake Gorge, " said Cinde Thomas-Jimenez, environmental education administrator at the Guadalupe Blanco River Authority (GBRA).
The unearthed gem is a 110 million-year-old geological playground.
"We use this as an outdoor classroom to teach people about the inner workings of an aquifer as well as the inter relationship between surface water and ground water, " Thomas-Jimenez said.
Footprints left by dinosaurs millions of years ago can be found there. Billions of fossils of marine life are scattered throughout the gorge. Multiple springs feed ponds and streams that are home to different species of fish.
"There's a lot of biology. We take a look at some of the plants that have come in and we look at biologic succession which is where plants come in and try to restore a scarred area, " Thomas-Jimenez said.
Tours are given by the Gorge Preservation Society multiple times a week. More information can be found at http://www.canyongorge.org
The GBRA and the Preservation Society have plans to build an expansive interpretive and learning center at the east end of the gorge. No timetable has been determined on construction.