This small Caribbean synagogue was just a few blocks from our hotel. Our groupleader, Mike, who had visited Sosúa numerous times before, explained that during WWII, Jewish refugees escaping Europe found a safe haven on the north coast of the island, and still reside here today. The synagogue is still in use, conducting Saturday services weekly.
There are several beaches in Sosua. The nicest one is the public beach (see pic).
There is the one from Casa marina, which has more waves.
Playa chiquita, like the name says, is a really small beach (20 meters long). It's close to the Casino.
And now there is a new beach (2 years old) which is also close to Casa Marina and the Waterfront hotel.
We went to Cabarete, the next town over, via a rented motorcycle and really had a lot of fun. It's a bigger beach with a younger, more bohemian crowd. I like the beach better, really more interesting things to see, specially if you enjoy (or doing!) windsurfing and kiteboarding. Plan to spend the whole day there, even stay the night if you can. I bet there's a better party scene there.