Visit Indian Grinding Rock State Historic Park, near Jackson and Volcano, and discover the largest collection of bedrock mortars in North America, with 1,185 mortar holes decorated with intricate carvings.
By Karen D'Souza, kdsouza@bayareanewsgroup.com, San Jose Mercury News: Travel
Tue, 09/06/2016 - 5:12pm
Visit Indian Grinding Rock State Historic Park, near Jackson and Volcano, and discover the largest collection of bedrock mortars in North America, with 1,185 mortar holes decorated with intricate carvings.