Sosúa is not a destination known for its sights. However, this museum stands as one of the exceptions, chronicling the immigration and settlement of the Jewish refugees in the 1940s. This is a fascinating place, and depending on the docent, you may hear that the Jewish settlers fleeing from Hitler, experienced a certain amount of prejudice here when they arrived
The fascinating website says no. The adjacent small wooden synagogue is the wedding spot for many Jewish couples from abroad. At this writing there wasn't a working telephone and hours were irregular, but chances are good that someone will be at the museum to let you in if you get there early in the day. You can try phoning Sosua Villas or the accommodating Hotel Casa Valeria nearby to confirm if the museum is open.
Near Banco Popular, Calle Dr. Rosen at David Stern, Sosúa, Puerto Plata, 57000, Dominican Republic
809-377–2038-Sosua Villas; 809-477–2038-Sosua Villas; 809-571–3565-Hotel Casa Valeria