Cool off for a while and do a little underground exploration this weekend at Inner Space Cavern in Georgetown, an easy 45-minute drive south of Killeen along Interstate 35.

The scientific term for exploring caves is spelunking, and this family-friendly place is considered one of the top spots in the state of Texas to do it. Several guided tours are available to choose from, including the Adventure Tour, which follows a paved and lighted trail through the largest rooms and formations. Guides discuss the history and discovery of the cavern during the roughly one-hour tour.

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