If you have a GARMIN GPS, go to
Ola te guia, primer Mapa y GPS de Republica Dominicana. Compras tu mapa por tu GPS Garmin and buy the DR maps. went o vacation in July 2009 and used it. It works. The only thing is that they have many points of interest in the data base, but if you know your coordinate which you can get on google map, just plug it in and it will take you any where DR. It was of great help to me going from Santiago to Punta Cana. Great travel tools to have in DR. If you do drive, drive very careful over there. Take your time, don't be crazy and follow what they do over there. There is no traffic law. Red lights are green lights for the driver over there. but with caution, you can drive. Wow! Buena suerte...