Visiting the oldest synagogue in continuous use in the Americas is a real eye-opener. We went on a Tuesday, and we were the only two visitors there for almost 30 minutes! We didn't feel that the fee was unreasonable, and it includes going into the sanctuary and museum. The sanctuary does have a sand floor (think walking on the beach, not a sprinkling on the floor). The pews and railings are all wood (mahogany I think). You cannot go up to the second floor gallery.
The museum has many items of interest, including a Torah scroll that is estimated to have been written in the 1300s, then smuggled out of Spain before the purge in 1492. There are many photos, paintings, family histories. There are several stories about Yayas (black nannies), similar to Mamies used in the US South. It is clear that these people were very special to their wards, and appear to have been treated well.
There is a thriving Jewish community in Curacao. We didn't get out to the cemetery (Bais Haim), but that might have been interesting to see as well.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.