Tucked into a residential neighborhood in Short Hills, the Cora Hartshorn Arboretum and Bird Sanctuary feels like a secret the locals have been keeping for decades. The 16-acre property is small by refuge standards but remarkable in the depth of experience it offers. Old stone buildings, mature forest, and well-kept trails create an atmosphere that feels genuinely historic. The arboretum blends conservation with community education in a way that feels organic rather than programmatic. Volunteers support nature programming, trail stewardship, and visitor engagement throughout the year. The sanctuary’s focus on connecting people, especially children, to local ecosystems gives every volunteer contribution a clear and immediate purpose. Bird life here is diverse relative to the property’s size, reflecting the value of even small protected green spaces in suburban landscapes. Learning to identify local species while maintaining the trails that give people access to them is a satisfying combination. The arboretum also hosts seasonal events that draw in community members who might not otherwise engage with wildlife conservation. For anyone living in or near Essex County, this place offers an unusually accessible entry point into conservation work. The scale is approachable, the community is warm, and the impact is real. Address: 324 Forest Dr S, Short Hills, NJ 07078.