Mount Desert Rock Lighthouse was established in 1830, about 20 miles southeast of Mount Desert Island. This is one of Maine's most remote lights. Even mild storms scour the island and frequently submerge it entirely. Keepers once transported soil from the mainland and tucked it into crevices on the otherwise barren rock to cultivated flowers and vegetables. But in late fall and winter, storms always washed it all away. It's a challenge to see this lighthouse, even from a boat, but whale-watching cruises from Bar Harbor sometimes pass by.