A park, or parkland, was an outdoor area designed for recreation. These areas were set aside to preserve natural, scenic, or historic features. They were also created within urban environments to allow individuals to experience the beauty and presence of nature.
Often parks were the location of public events, such as the performance of music. (DS9: "Image in the Sand") By the early 23rd century, some of the big cities on Earth were encircled by parkland. (TOS: "The Cage", "The Menagerie, Part II")
In the 23rd century, as a kid, Captain Christopher Pike lived in a town on Earth that was surrounded by fifty miles of parkland. He used to ride out on a horse with other people for a day. They would stop to have a picnic lunch. (TOS: "The Cage", "The Menagerie, Part II")