I mentioned earlier today that Viña del Mar is East of Valparaiso. This may not make much sense to you if you look on a big map. After all, Viña is to the right of Valparaiso when looking out to sea. It used to confuse me as well (I'm assuming I'm not the only directionally challenged person out there). So here's a highly detailed map from 1925 that shows how and why Valpo is west of Viña and also why you can see Aconcagua from Valpo when you might think you were looking due north. It also shows why Valparaiso makes such a good port.