Today, I visited atop three in my tour of Somerville landmarks: The Prospect Hill Tower. Prospect Hill was the site of a Revolutionary War lookout point, with views across Boston Harbor and up the Charles River. It’s also where the first American flag was flown, on January 1, 1776, by the order of George Washington. Later, it was a muster point for the Civil War.
You can only climb the tower a couple times a year, on docent led tours. It’s worth it; the views are awesome.