Key West Aquarium, Key West (must see)

Located in Mallory Square on the Key West waterfront, the Key West Aquarium is one of the oldest aquariums in Florida, built between 1932 and 1934. It’s a small, classic attraction that has been part of Old Town for generations, and it’s an easy stop to include while exploring the harbor area.

Originally designed as an open-air aquarium (which was one of the first of its kind at the time), it now features a mix of indoor exhibits and outdoor tanks. The focus is on marine life from the Florida Keys, so expect a lineup that feels local and familiar to the surrounding waters. Visitors can see sea turtles, sharks, stingrays, and tropical fish, along with displays that help explain the animals’ habitats and behavior. One of the most popular sections is the touch tank, where guests can gently interact with certain sea creatures while staff share basic facts and answer questions.

Many people spend the most time outside near the shark and turtle areas. The shark tank often includes species such as nurse sharks, blacktip sharks, and lemon sharks, and it’s worth watching them move through the water up close. The sea turtle exhibit is another highlight, especially for anyone curious about conservation and rescue efforts in the Keys. The aquarium also runs daily feedings and short presentations at set times, which can make the visit feel more active without turning it into a long event.

The Key West Aquarium is open daily throughout the year, with tickets available online or at the entrance. Some visitors mention the ticket price, but it can be a good match for anyone who prefers smaller aquariums where it’s possible to slow down, read the signs, and actually watch each exhibit without heavy crowds. Tickets are often valid for two days, and re-entry is usually allowed, so it’s possible to stop in more than once if plans change.