PORTLAND — The Portland Observatory Museum will hold its annual Flag Day Celebration and Grand Opening of its new visitor experience from 10 a.m. to 7 p.m. Friday, June 14, at 138 Congress St. Annual Flag Day Celebration and the Grand Opening of the New Visitor Experience at the Portland
In honor of Flag Day and the Grand Opening of brand new exhibits the observatory will be free and open to the public with tours and activities throughout the day. The Portland Observatory (1807) is a National Historic Landmark and the last remaining maritime signal tower in the United States. Full event schedule is posted at portlandlandmarks.org.