The 176-acre (0.71 km2) park was developed in 1904 on land through which the Santa Fe Trail had passed. It contains several famous landmarks: The Scout and the United States' official World War I museum with its Liberty Memorial. The grounds also feature such commemorative statues as the Pioneer Mother Memorial and the Hiker. The park has a large lake, a fitness trail, tennis courts and ball fields and is a popular spot for concerts and festivals during the summer months. Also features Kansas City's first off-leash dog park and is the host park to both the Penn Valley skatepark located in the southwestern corner of the park and the Just Off Broadway Theatre.