Neville

Yep, it's in Garner SP. It's in the area known as Horseshoe Canyon. If you go to the Texas Parks and Wildlife website and pull up the Garner SP section there's a detailed trail map. The trails are divided up into the East and West trail sections (each are color coded) and Crystal Cave sits right in between the two sections. You'll see it labeled on the map. You're able to go deep inside but I'm not sure how far. I didn't go in due to the large crowds around it. In fact, if you look at my photo closely you'll see a child roaming around inside so it's real easy to get into. Based on experience now I would try to venture in during the week to avoid the crowds.

There's another cave called White Rock cave that sits just off the Bird Trail in the East section. It's about half a mile from the trailhead in the Pecan Grove camping area. It's labeled as well on the trail detail map.