The OAKA Sports Complex is a multi-purpose sports facility located in Athens, Greece. It was built for the 2004 Summer Olympics and includes several venues, such as the main stadium, an indoor arena, and a swimming pool. The complex is designed to host various sporting events, concerts, and other large gatherings. The main stadium, known as the Olympic Stadium, has a seating capacity of around 69,000 spectators. The complex is also home to the Athens Olympic Museum, which showcases the history of the Olympic Games. Overall, OAKA serves as a significant hub for sports and entertainment in Greece.