Bass Harbor Head Light Built in 1858 to warn the mariners of the Bass Harbor Bar and to mark the entrance to Blue Hill Bay. It also was shelter for vessels against the easterly gales. The Lighthouse is attached to a one and a half story wood frame keepers house by a covered walkway. A bell tower was added in 1876 but was removed and a 1902 oil house remains. The fifth-order Fresnel lens was replaced with a fourth-order Fresnel in 1902. The keeper's house is the residence for the Southwest Harbors Coast Guard Commander and is not open to the public. The lighthouse is best seen from the water, There are paths leading down to boulders and a walkway takes you to the front of the lighthouse and house.