This is the abandoned radar tower at Camp Hero in Montauk. If you google "Montauk Project" you will quickly find that Camp Hero is a locus for almost every conspiracy theory in circulation. If I recall, it is something about Alister Crowley and the Pope plotting to assassinate Kennedy using technology recovered from an alien space craft downed by ex-nazi scientists over area 51.
A few decades ago nobody wanted this property and you could have had it for a dime. If I had known, I would have bought it and turned it into a techno rave club. The dj would have been stationed on the deck just in front of the curved reception field. He would have spun vinyl as it slowly rotated. The doof doof from the giant speakers would have been absorbed by the acres of surrounding pine barrens. I would have called the club "Camp Gay-dar"