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Historic tower · Portland, Maine
Portland Observatory
A wooden signal tower from 1807 on Munjoy Hill, used to warn the port of arriving ships with flags. It is the only surviving tower of this type in the country, with views over Casco Bay.
Illustrative images. The pictures in this guide are illustrations based on the real place, not photographs, and may differ from it.
Discover
About Portland Observatory
The Portland Observatory was built in 1807 by Captain Lemuel Moody atop Munjoy Hill, one of the highest points of the peninsula. The octagonal wooden tower, about 26 meters tall with seven levels, served as a signal station: from the top, using a telescope, Moody could spot ships still far from shore and hoist flags that told merchants which vessel was arriving, hours before it docked.
The service operated until 1923, when radio made the tower unnecessary. It is the only signal station of this kind remaining in the United States and is a National Historic Landmark. The structure has been restored and is maintained by the city and a local preservation association.
On the guided tour you climb the interior stairs to the cupola, passing exhibits about the tower’s construction and the flag system. From the top you can see the harbor, the islands of Casco Bay, downtown Portland and, on clear days, the White Mountains to the west.
The tower sits among the houses of Munjoy Hill, near the Eastern Promenade, a waterfront park with lawns and a shoreline trail.
Before you go
Practical information
Cidade Turismo reviews its information regularly, but something may have changed. Check with the place before planning your trip.
How much time to set aside
About 45 minutes for the guided tour to the top.
Best time
On clear days, when the view reaches the islands and the mountains. The tower opens seasonally, generally from late May to mid-October; check days and hours before you go.
How to get there
It’s on Congress Street in Munjoy Hill, about 1.5 km from the Old Port. You can walk up the hill or take a city bus. Admission is paid; check the current fee schedule.
Tip
Combine the visit with a walk along the Eastern Promenade, a few blocks away. The interior stairs are narrow and steep; the climb requires some fitness.
Official website
Get your questions answered
Frequently asked questions about Portland Observatory
What was the Portland Observatory used for?
It was a signaling station: from the top, arriving ships could be spotted and flags would notify the port merchants which vessel was coming, hours before it docked.
Is the Portland Observatory open year-round?
No. The tower is open in season, generally from late May to mid-October, with guided tours. Check the calendar before you go.
How tall is the Portland Observatory?
About 26 meters, over seven floors, atop Munjoy Hill.