Naval Submarine Base New London by the Submarine Escape Immersion Equipment in the 2000s. On January 21, 1954 the first nuclear-powered submarine, , was launched from Groton. "Nautilus" became the first vessel to transit the North Pole during a historic trip across the Arctic in 1958. "Nautilus" spent most of her career assigned to Submarine Squadron 10 located at State Pier in New London. It was retired from service in 1980. In 1982 "Nautilus" was designated a National Historic Landmark in Groton. It is permanently moored south of the main gate, attached to the U.S. Submarine Force Museum. Self-guided tours are available to the public
Lake North Pole Lake North Pole Lake North Pole, also known as The North Pool, is a small, shallow lake near the North Pole, and is currently the northernmost lake in the world. It came into existence in 2002, occurring each year, then freezing over in the winter. The lake, which is approximately one foot deep, is composed almost entirely of fresh water melted from the ice beneath. A web camera is stationed beside the lake to monitor changes. It was built by the Polar Science Center. On July 26, 2013, the depth was estimated to be approximately 40 cm. Members of the