Church of the Covenant, an 1867 Gothic Revival masterpiece, has one of the largest collections of liturgical windows by Louis Comfort Tiffany in the country; its 236 foot steeple is the tallest in Boston
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