Educational and recreational activities, including the operation of public and private day schools of elementary and/or high school grades licensed by the state of New Jersey, as well as municipal and county buildings, public libraries, public open space, public parks, public recreation and conservation areas, public parking areas, public restrooms and other "public purpose uses." Public purpose uses shall include radio and/or cellular antenna systems that may receive and transmit and re-transmit signals and may be installed on the water towers located in the Borough of Ship Bottom, subject to the approval of the land use review board and mayor and council.