New London Harbor Lighthouse is a historic landmark built in 1801 for the fishing and whaling industries. It is Connecticut's oldest and tallest beacon, and the fourth oldest in the US. The keeper's house is closed to the public; however, tours are available if you have over six people. The unique advantage is that during a tower tour on a clear day, you can see up to 7 lighthouses - two in Connecticut and five along New York in the sound. More lighthouses can be seen from this spot than any other place on earth.