ARLHS USA-975 - Nauset (North)/Three Sisters (North) Technically this northern member of a rare three light system originally served mariners about 1000\' east near the Nauset cliff. The three sisters are inactive replaced by the single lighthouse (USA-529). http://www.unc.edu/~rowlett/lighthouse/ma2.htm http://www.lighthousefriends.com/light.asp?ID=489 These coordinates are verified. -69.957000000002, 41.859825, 0