Informal learning environments, such as aquaria, are attracting an increasingly diverse visitor population as the number of people with disabilities living in the community has grown. Although general guidelines exist to assist informal learning environments in designing accessible spaces, the guidelines are not specific enough nor do they guarantee that the spaces will be usable by all visitors. This paper reports on the findings from a post-occupancy evaluation that was conducted at the Georgia Aquarium that: 1) documented the current exhibit display and interpretation design practices; 2) provided visitor feedback on the usability of exhibit displays and interpretation; and 3) discussed the needs of visitors with disabilities.