We went horse riding on a trip arranged by our hotel. Getting to the horse ranch was a mission in itself through some of the bumpiest roads ever but we finally reached the horses. Our guides were pretty good asking us all our ability and trying to match us up with horses to suite. My step dad has never ridden and practically got a pony which was hilarious as he looked huge in comparison.
I would recommend this as a good way to see some of the real Dominican as you actually get to see locals and the shatty style villages they live in. It's very easy somewhere like this not to venture form the all inclusive resort and see any of the real people but this is a good way of doing so and the local children love to come out and see the horses. There are some great sites and there is one amazing view from the top of a hill down towards the sea. The ride itself takes a morning in total and it can get pretty hot and uncomfortable but it is worth it.