In September, with Hannah and John, we flew to Madrid for 3 night visit. While Madrid is a big city and the small cities are really my favorite, Madrid was a nicer big city than I was expecting. Not nearly as clean and eco-friendly as Stockholm, but it did offer a lot to do and see - a 3 day trip (with a 1 day side trip to Toledo) was perfect - enough time to see the sites, eat the food, drink the wine, and experience the night-life.
Must Eat: Sangria, Paella, Jamon Iberico, Spanish table/house wine, and Tapas including Manchego Cheese (seriously delicious) and stuffed peppers (yum).
The best thing in Madrid deserves two pictures.