The views of the sunset down on the pier are amazing. There are these gorgeous pirate sailboat looking vessels that ferry around tourists that float right along with the sunsets. Make for great photo ops!
Apologies for the bad image composition, I really had no idea how to take pictures back when I was 17.. =p
Edit: Almost forgot! Find a charter service and go snorkling! There are several great spots, my favorite being the Sombrero Key Lightouse. Large schools of Barracuda up to 5 feet in length hang out all over and amazingly you can get pretty darn close! Tons of other creatures to see such as sharks, rays and of course loads of fish. Definately plan a snorkling trip somewhere!
