37,000 Acres of Irvine Ranch Land Receives Prestigious ‘National Natural Landmark’ Designation from U.S. Department of Interior • ‘The Irvine Ranch National Natural Landmark’ joins Mount Shasta, Anza Borrego, Hawaii’s Diamond Head and other beloved national landmarks • Honor recognizes designated land as “a nationally significant natural area” • First site in California to receive NNL designation since 1987 • Land is “a shining example of our nation’s natural treasures,” says National Park Service Director Fran Mainella • Governor Schwarzenegger notes, “Today’s event celebrates another area of our state that can be enjoyed for generations.” NEWPORT BEACH, Calif.--(BUSINESS WIRE)--Standing on...