Downtown Aquarium is the product of redeveloping two downtown Houston landmarks ā Fire Station No. 1 and the Central Waterworks Building. This magnificent six-acre entertainment and dining complex is a 500,000-gallon aquatic wonderland, home to over 200 species of aquatic life from around the globe. With a full-service restaurant, an upscale bar, a fully equipped ballroom, aquatic & geographic exhibits, shopping and a variety of amusements, Downtown Aquarium has it all!