Meet at 41 E. 57th St. at Madison Ave (nygallerytours.com). Subway: N, Q, R to Lexington Ave–59th St; 4, 5, 6 to 59th St. Well, you can't very well be the greatest city in the world without taking up a lot of vertical space. If we could build a Babel-esque tower to the moon, with glass elevators and polite doormen, we'd do it. (Seriously, we're crazy!) Check out some of the city's finest tall buildings with this midtown tour.