Obviously a must visit if you're in the city. This is the older part of the city and its historical center. It features old colonial houses, albeit many are being restored, so there is a slight gentrification aspect to the district. Nevertheless, walking through the streets lined with pastel colored houses is gorgeous. You could easily spend a morning or afternoon strolling through the districts various streets, while resting in the many open spaces when you're tired. Also a nice place to grab a bit to eat!