Highseas is a historic early 20th-century summer estate in Bar Harbor, Maine. It is located on Schooner Head Road on the east side of Mount Desert Island, surrounded by the lands of Acadia National Park. Built in 1912, it is one of the few grand summer estates to survive the island's devastating 1947 fire. It is now owned by the Jackson Laboratory and used as housing for its workers. The property was listed on the National Register of Historic Places in 1978.