Wardenclyffe was Tesla's laboratory in Shoreham on Long Island. It's a fantastic place. I visited a few times while I was doing research for The Invention of Everything Else. At that time AGFA, who now owns the property had the place locked down and so my visits involved lots of sneaking around, peeking through wire fences.
Now there's an effort underway to raise funds to turn the site into a long overdue Tesla Museum.