Apulia in general is not very touristy, at least compared to other Italian regions such as Tuscany or Campania, but Alberobello is. The place is the highlight of any trip to this region at the heel of the Italian boot, and it's easy to see why: a nice little town, quaint and very unusual houses and lots of souvenir shops. To avoid those, it is only necessary to wander off into the side streets, where you can find exactly the same kind of trulli. The quarter of Aja Piccola is less touristy than the Monti area. The trulli are not confined to this town, but are rather spread out over a large area, and can be seen far out in the countryside. The houses themselves look pretty similar, but you should take note of the different symbols painted on the roofs (mostly Christian, but also some pagan signs).