Shasta Dam
Dam · Shasta Lake, California
A 602-foot concrete arch-gravity dam across the Sacramento River, finished in 1945 after nine years of continuous pouring, and still the second tallest concrete dam in the United States. Its spillway is three times the height of Niagara Falls, and the free guided tour takes you down inside the structure and out onto the crest.
16349 Shasta Dam Boulevard, Shasta Lake, California, 96019, United States
Visitor centre and crest open daily in daylight, free. Free guided tours several times daily; photo ID required.