Portland Observatory, Portland

The Portland Observatory in Maine is a unique and historic maritime signal tower that has stood tall since 1807, making it the only surviving tower of its kind in the United States.

Originally built by Captain Lemuel Moody, the octagonal, seven-story structure was designed to communicate with incoming ships using both signal flags and a telescope. The observatory provided advanced warning to shipowners about approaching vessels, allowing them to prepare well before the ships reached port. The tower’s location on Munjoy Hill provided an unobstructed view of Portland Harbor, making it the perfect spot for the vital task of maritime signaling.

Standing 86 feet tall and designed with an innovative octagonal shape to withstand strong winds, the Portland Observatory is both an architectural and engineering marvel. Its heavy fieldstone base and white pine framing, reminiscent of ship masts, have kept it steady through many storms over the years.

The observatory was designated a National Historic Landmark and a National Civil Engineering Landmark in 2006, recognizing its significance in American maritime history.

Today, visitors can climb to the top of the observatory for breathtaking panoramic views of Portland and its harbor, while learning about its fascinating role in early American marine communication. The observatory, managed by Greater Portland Landmarks, serves as a museum and remains one of the most iconic historical structures in Portland.