Most know Shasta Lake in northern California as the Houseboat Capital of the World. For those who prefer cooler weather and non-houseboat trips, there's something special to see and do at Shasta Lake — Shasta Lake Caverns. Formed over 250 million years, you get to see a cathedral of color and formations among many amazing attractions in the cool caves- and getting there is half the fun! Shown in the photo is a vista of Shasta Lake before you enter the caves.