Adventure tour of the Longhorn Caverns near Burnet, TX. You'll crawl, squeeze, and climb through the limestone caves carved out by millions of years of water erosion.
The hike through the caves is 1 1/2 hours long. You'll need to bring a headlamp, knee pads, elbow pads, long pants, and a helmet. OR you can rent the gear from the park.
Tickets are $45 per person. Reservations must be made in advance. There is a limit of 15 people on the tour, so reserve soon! (512)[masked]
Tours are at Longhorn Cavern State Park, it is a 3-4 hour drive south of the metroplex. The Wild Cave tour starts at 9:00 am on Saturday. There is no camping at this park, but you can come stay with the rest of the NTO crew at Inks Lake State Park located about 10 miles away from Longhorn Caverns.
NTO-er Craig says the tour is awesome. And Craig is awesome. Therefore his claim that the tour is awesome has complete credibility. But if you don't believe Craig, read some of the reviews on TripAdvisor (4.5 out of 5).