I couldn´t find the reason of why Quito is a '' unesco city '', actually it looked exactly the same that a lot of other cities in the Andes like in Peru or Bolivia. The new town and the old town are the only touristic parts of the city, the ohter parts are insecure at night and even at day light sometimes. Everything, clubs, bars, etc, closes at 3 tops, even on weekends.
Insider Tip:take de '' Eco via '' to move in the city, it's like the subway but above all. The best and cheapest way to move because it's kind of a big city but without the high buildings. Also the altittude makes a little difficult to walk all day. The best place to stay is somewhere near the '' foch square '' in the new town called '' LA MARISCAL '', it's full of bars, clubs and everything for the tourist.