If you’re planning a future trip, please keep in mind the Aquifer Tour may not be available. Click here to learn about the regular Discovery Tour, which will resume once the Aquifer has returned to normal levels.

The Trinity Aquifer is the local underground water reservoir. This aquifer lies beneath the Caverns, and under normal circumstances the water table is not high enough to be seen. However, when heavy rains send large amounts of groundwater seeping into the aquifer (a process known as “recharge”), the water table begins to slowly rise into the lower chambers of Natural Bridge Caverns. The Discovery Tour passes through some of these lower passages, and with enough rain, the water table can rise high enough to submerge these walkways. Once the rain stops, the groundwater will slowly recede until it once again disappears into the hidden passages below Natural Bridge Caverns.