I´ll name one for a start - my absolute favorite is Lencois de Bahia, Brazil.
A tranquil small town in the middle of a stunning scenery.
What impressed me most though is the apparent local common sense about their approach to tourism.
In Brazil, I often had the impression that travellers are above all regarded as a source of quick dollars, but not so in Lencois. This community embraces low-key eco-tourism and every business treats you with a lot of care and respect, genuinely trying to make the customer happy. Admirable.
There are some very good hostels and B&Bs - I stayed in two of them and never had a better breakfast anywhere: lots of fresh fruit and everything all-you-can-eat. Most places have barbecue areas, too.
All local tour guides receive training in a communal "guide school". Tour operators even go so far as to recommending their competitor´s tours if they think they offer a tour which better suits your specific needs.
There is a huge natural water slide a short walk away. I never had so much fun destroying my swimming trunks.
Lencois also has the best Pizzeria outside Italy. :cool: