The Field Museum was founded to house the biological and anthropological collections that were assembled for the World's Columbian Exposition of 1893. These objects form the core of the museum's collections, which have grown through world-wide expeditions, exchange, purchase, and gifts to more than 20 million specimens. Sitting on the same Chicago Park District land as the John G. Shedd Aquarium and the Adler Planetarium near downtown, the three attractions combined create a pretty powerful learning experience for visitors.