MAKE AN OFFER. THE MORE YOU BUY THE BETTER DEAL I WILL ACCEPT The postcard depicts Sentinel Rock in Yosemite National Park, California. Sentinel Rock is a massive spire that rises 3,086 feet above the meadows of Yosemite, located about midway in the Valley on the south side of the Merced River. The postcard was published by the Western Publishing & Novelty Co. in Los Angeles, California.