According to local lore thousands of years before the indigenous tribes named the island Minnnahanonck it is believed that a band of very small determined visitors (alien?) looked upon Roosevelt Island as a holy place and they erected equally small guardians to stand watch over their sacred site. It was at first thought that these stone monoliths were quarried here on the island but the stone appears to be of another world. [Satire.] Currently these three foot tall sentinels now stand at Lighthouse Park looking like an extremely long row of chess pawns waiting to be summoned into action.
Trivia question (to which I have no idea of the answer): How many of these little guys are there?