The land in Shoreham upon which Nikola Tesla's lab still stands is about to be cleared for sale. Tesla's "magic tower" (which at one time could be seen from New Haven, CT) is no longer standing but its concrete base is still there. There's a great article about the history of the property and Tesla's contributions to the advancement of science in this Long Island Press article.
http://www.longislandpress.com/2010/09/16/teslas-last-stand-on-long-island/