Visitors to Boston's Skywalk Observatory say that this place is unlike any other. You'll get a birds-eye view of the city and surrounding countryside from 50 stories up, and when visibility is good you can see up to 100 miles away.
When you visit, be sure that you pay attention to the accompanying audio tour (included with every admission), which gives you the history behind various landmarks you'll be able to see from the Observatory. Each audio guide also lets you choose a children's version of the tour, too, in case you have little ones to entertain. If you want a truly special experience, Yelp reviewers suggest that you consider timing your visit to coincide with sunset in order to enjoy a remarkable view. Don't forget to stop by the on-site Dreams of Freedom Museum, either, which includes a popular exhibit that explores how Boston's cultural diversity has shaped the city over many decades.