Known for its scenic arched footbridge, Somesville is the home of Somes Sound, a five-mile long embayment bordered by Norumbega Mt. (852 ft., 260 m) to the east, and Acadia (681 ft., 208 m) and St Sauveur Mts.(249 ft., 207 m) to the west. At its deepest point, the sound is slighter deeper than 40 m, and in several places it is between 30 and 40 m deep. The entrance to the sound, called "The Narrows," is 10-20 m deep and is bordered by boulder-strewn bluffs to either side. Somes Sound remains an extraordinary coastal embayment. Recent observations on the seafloor geology reveal that it has experienced a complex history and has some fjord-like aspects.