The Frelinghuysen Arboretum is a 127 acre property overseen by the Morris County Park Commission. It centers around a palatial home dating back to 1891, the onetime summer residence of a wealthy New York couple. Their daughter, Matilda Frelinghuysen, a gardening enthusiast, bequeathed the property to Morris County to be used as an "arboretum." According to the Morris County Park Commision, an...