Gem-Mining

The largest marble cave entrance in the eastern US sits at the center of this family-friendly nature park. Self-guided trails wind past caves, waterfalls, and geological formations that kids find genuinely fascinating. The stone bridge itself is massive and the gorge below it is dramatic. A gem mining sluice keeps younger kids busy for a long time. Seasonal activities include snowshoe trails in winter. It is a privately run park so expect a polished experience with good signage and clean restrooms.

The largest commercial cavern in Texas with massive formations illuminated by dramatic lighting on guided tours that descend 180 feet underground. Above ground a six-story ropes course and zip rails give older kids an adrenaline rush and the AMAZEn Ranch Roundup outdoor maze is a hit with younger children. The gem mining and panning activity keeps kids busy for a surprisingly long time.