See 5 Lighthouses by bicycle, learn Portland's colorful history, and bike along the ocean. Discover Portland Maine and the shores of Casco Bay by bicycle! Join us for a 5-hour bicycle tour of Portland, Maine featuring the Maine coast, lighthouses, and Portland’s history. Join your knowledgeable local guides, to learn the history of the wonderful city of Portland, see 5 lighthouses, and enjoy a gourmet picnic lunch.