Egg Island Light was placed into operation in 1875.  The narrow, rocky ledge upon which it sits is a nesting site for seabirds including petrels, gulls and eider ducks.    Originally the iron lantern was attached directly to the eaves of the house.  Later, a square brick tower elevated the beacon.  An aero-marine beacon superseded the original fourth-order Fresnel lens when the light was automated in 1976. 
 
 

 

Bass Harbor Head Light is located on the southern extremity of Mount Desert Island.  The cylindrical brick lighthouse has been used as an aid to mariners since 1858.  It was unmanned in 1974 but a Coast Guard family still resides in the former lightkeeper's house.  The original fourth-order Fresnel lens remains in place.  Its light's focal plane lies about fifty-six feet above the water.