The Cadburys were particularly concerned with the health and fitness of their workforce, incorporating park and recreation areas into the Bournville village plans and encouraging swimming, walking and indeed all forms of outdoor sports. In the early 1920s, extensive open lands were purchased at Rowheath and laid to football and hockey pitches together with a grassed running track. Rowheath Pavilion was designed and built in accordance with the instructions of George Cadbury and opened in July 1924. At that time, it served as the clubhouse and changing rooms for the acres of sports playing fields, several bowling greens, a fishing lake and an outdoor swimming lido, a natural mineral spring forming the source for the lido's healthy waters. The Rowheath Pavilion itself, which still exists, was used for balls and dinners and the whole area was specifically for the benefit of the Cadbury workers and their families with no charges for the use of any of the sporting facilities by Cadbury employees or their families. The lido was eventually closed in the 1970s after complaints of noise disturbance were made by residents of the newly built Oak Farm estate, coupled with new and stringent health and safety regulations relating to outdoor public swimming facilities. Cadbury's also built the Bournville indoor swimming baths on Bournville Lane (separate buildings for 'girls' and men), the Valley pool boating lake and the picturesque cricket pitch adjacent to the factory site, that was made famous as the picture on boxes of Milk Tray chocolates throughout the 1950s and early 1960s.