I should take a picture of the "beach" here, but I don't want to disappoint everyone. It's on the lake, and the lake is gross. Full of weeds and such. I'm jealous of those beaches that others have posted.
This is Flamenco Beach, located in culebra island about 17 miles northeast of puerto rico
This is another beach in luqillo:
And this is a view of a beach in luqillo from up in the mountains, theyre around 3,000 ft above sea level:
I actually just came back from puerto rico, and took my own pics but need to upload em to the pc first. But its a great place to visit and no need for passport or to change currency for us citizens.