UNITED STATES OF AMERICA

Photo by Arthur T LaBar (Flickr/CC BY-NC 2.0).

• 1978: Mesa Verde National Park
• 1978: Yellowstone National Park
• 1979: Everglades National Park
• 1979: Grand Canyon National Park
• 1979: Independence Hall
• 1979: Kluane / Wrangell-St. Elias / Glacier Bay / Tatshenshini-Alsek

• 1980: Redwood National and State Parks
• 1981: Mammoth Cave National Park
• 1981: Olympic National Park
• 1982: Cahokia Mounds State Historic Site
• 1983: Great Smoky Mountains National Park
• 1983: La Fortaleza and San Juan National Historic Site in Puerto Rico
• 1984: Yosemite National Park
• 1987: Chaco Culture
• 1987: Hawaii Volcanoes National Park
• 1987: Monticello and the University of Virginia in Charlottesville
• 1992: Taos Pueblo
• 1995: Carlsbad Caverns National Park
• 2015: San Antonio Missions
• 2019: The 20th-Century Architecture of Frank Lloyd Wright
• 2023: Hopewell Ceremonial Earthworks