Stalagmites, stalactites, flowstone deposits, and crystals entice visitors to the Lake Shasta Caverns. To see this impressive spectacle, you must take the two-hour tour, which includes a catamaran ride across the McCloud arm of Lake Shasta and a bus ride up North Grey Rocks Mountain to the cavern entrance. The caverns are 58°F year-round, making them a cool retreat on a hot summer day. The most awe-inspiring of the limestone rock formations is the glistening Cathedral Room, which appears to be gilded. A gift shop is open from 8 to 4:30.
20359 Shasta Caverns Rd., Exit 695 off I–5, 17 miles north of Redding, Lakehead, California, 96051, United States