Friends told us to try the Shake Shack as we departed for our first visit to New York. As luck would have it, there was a location in Madison Park close to our hotel. The "Shack" is nothing more than a glorified park concession stand. There is no indoor seating at this location and we shivered eating outside on rickety park chairs and tables (which were at a premium). But the burgers made it worth it! These were indeed the best tasting hamburgers I've had in my life. Their "mushroom patty" is unique and delicious. The fries and shake were equally excellent. The Shake Shack had long lineups well into the evening (on a weeknight too) and we can see why. This place is a "must eat" when you're in Manhattan.