Issued in 1934 as part of the U.S. National Parks series, this green 1-cent stamp features the iconic El Capitan rock formation in Yosemite National Park, California. Designed to celebrate America’s natural wonders, it captures the grandeur of the towering granite cliffs and pine-covered valley floor. The detailed engraving reflects the romantic vision of America’s wilderness that characterized early 20th-century U.S. commemoratives. This issue was widely used for postcard and low-rate mailings during the 1930s.