Not only is Key West a wonderful environment because of its local flora and fauna, but also because of the architecture. There are so many wonderful, quirky and colorful buildings with equally fascinating histories.
Today the Aquarium hosts a wide range of fish and invertebrates. They have several educational programs, as well as touch tanks and informational displays throughout, and was one of the more enjoyable historic aquariums that I have visited.
One of the essential Key West experiences is a sunset in Mallory Square. Many nights we were elsewhere on the island, usually seeking dinner, but we did clear our schedule for this experience on one of our evenings.