Technically we should be in St. Lucia. But it's a New Years trip, and the island is closed. So I don't know if you will always see this or not, as it was never mentioned in the any of the review's I read.
The captain steered us to Montserrat, a dormant volcano. 2 nautical miles was the closest he was allowed to bet to it. Many of the houses are empty there. I got a few good shots, but was limited as we were fairly far away. The boat stopped there for about 20 minutes, and then we went back on track to San Juan.