Snorkeling in Puerto Rico

[Topsailsun]

My fiance and I will be spending a night in Puerto Rico en route from our honeymoon. We won't be able to dive because we won't have sufficient time between flights, but we'd love to get in some snorkeling. Are there any good, easy to access snorkeling spots on the main island? Shore snorkeling spots would be ideal so we could book a hotel near the spot and go in and out a couple times while we're there.

Thank you!