N.J. Stat. § 40:37-254: Purchase and condemnation of contiguous lands

The board of chosen freeholders of any such county wherein land has been acquired, improved, maintained and developed, as provided in this article, may, if such board shall so determine it to be proper and necessary for the convenience, accommodation and benefit of the inhabitants of the county, acquire, in fee or otherwise, by purchase, gift, grant, devise or by the exercise of eminent domain, additional lands contiguous to any property developed and maintained as a public park or recreation ground.