After searching on the internet for about an hour, I finally found a close-up photo of Vieques' endangered lighthouse, Puerto Ferro. This picture shows the immediate danger the lighthouse is in, as the tower is crumbling and there are large holes in the walls of the keeper's quarter.
Puerto Ferro Lighthouse, 2048x1536
There is also a virtual tour of the lighthouse, but, I can't get it to work. You can try at http://southeast.fws.gov/vieques/media.html