Irvine Company established one of California’s largest nature preserves by permanently dedicating more than half of the Irvine Ranch – 57,500 acres – to open space and parklands. It is the only land in California to receive both the California State and United States National Natural Landmark designation. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.