Tree Hill Nature Center in Jacksonville, Florida, grew from a community effort to protect urban woodland and wetlands from development into a nonprofit wilderness preserve and environmental education center. Arlington residents organized in 1970 to secure the property, with city and state support helping acquire and expand the land over time. Since opening in 1971, Tree Hill has added trails, learning facilities, and visitor amenities while building programs in natural science, school instruction, and teacher training. Its creeks, ecosystems, and notable oak anchor the site, while later projects and partnerships helped strengthen Jacksonville’s broader network of nature parks and education sites.