The long-awaited grand opening of the Regenstein Center for African Apes (RCAA) at Lincoln Park Zoo takes place today at noon. Chicago welcomes back two gorilla groups and two chimpanzee groups, including a new baby gorilla "Azizi" who was born while they were away. The new habitat, built at a cost of $26M and covering 29,000 square feet, is a vast improvement over the previous Great Apes building at LPZ. It provides outdoor space for the animals as well as improved indoor exhibits, including hidden "devices" for cognitive enrichment that also allow the apes to interact with visitors. Lincoln Park Zoo is free and open to the public 365 days a year.