#1 is Zoni, #2 is Carlos Rosario Both selected for the views.
Zoni has beautiful sand, and overlooks several uninhabited cayos including the aforementioned Culebrita, Also St. Thomas, St. John and Jost.
Carlos Rosario, a prototypical Virgin Island shell beach, also overlooks a number of cayos and the main island of Puerto Rico. Best snorkeling on Culebra. For good measure, there is a nice blowhole in a natural jetty to the south.