Spring Point Ledge Light was built in 1897 to warn mariners of a dangerous ledge in Portland Harbor. The light resembles a giant spark plug, sitting at the end of a granite breakwater in South Portland. You can visit this light by heading south on Route 77 in Portland. Continue on Broadway in South Portland. Turn right on Pickett Street and then left onto Fort Road, which ends at Fort Preble and a parking area. The light is owned by Spring Point Ledge Light Trust, which maintains the light and offers tours during the summer months.