I've visited the 9/11 Memorial a couple of times so skipped it on this trip; One World Trade Center (ie Freedom Tower) is still jaw-dropping as the tallest building in the Western Hemisphere (the same architect designed Willis Tower and Burj Khalifa)
The Edge is located at 30 Hudson Yards with major tenants TimeWarner, KKR, Facebook and Wells Fargo; the building is at the northernmost end of the High Line, a 1.5 mile long elevated park that has become one of the city's biggest attractions
The Cooper-Frost-Austin House, built in 1681, is the oldest house in Cambridge; the city of 116,000, home to Harvard and MIT, has 57% of its residents possessing at least a bachelor's degree
I wanted to stop at the World Famous Crochet Museum for Mike but, unfortunately, it wasn't open; the former Fotomat booth is stuffed with all sorts of crocheted pieces