There is always something to do in this park, including visiting a world class zoo (with very unique exhibits, a huge walk through bird cage from the 1904 Worlds Fair and with the best train ride anywhere with several unique tunnels), boats you can rent near the 1904 Worlds Fair Pavilion, golf courses, a very large outdoor theater (the Muny) with world class plays and acts, You can also rent a boat in the summer, or go sledding in the winter.
Museums include a Science Center (with many interactive exhibits and an Omnimax theater), a World Class Art Museum (was the fine arts pavilion from the 1904 Worlds Fair), and the Missouri History Museum.
Larger than Central Park in New York, this unique park is a Saint Louis treasure with something for everyone.
Many things are FREE to attend including the zoo, and most or all museums. Shows and special events can have costs. Parking in some lots is not free. There is a lot of on-street parking (but it fills up too) within the park.
No visit to Saint Louis should miss Forest Park