This preserve is a must see in my opinion, with its glass clear water and striking white sands. However the only way is by water, and i would recommend going by kayak. Get Up and Go kayaking is an excellent company with clear kayaks and a tour for $60 per person to shell key and back. The trip is easy for beginners and those who have never been in a kayak and our guide, Bria, was amazing as she was helpful and very instructful.