Pen Ponds are situated in the middle of Richmond Park. They hold an assortment of fish including perch, carp, pike and bream. Richmond Park was enclosed as a hunting park by King Charles I in 1637 but still retains the main ingredients of a mediaeval deer park. Essential to its character is the rich landscape of grassland areas of bog, bracken, wetland, woodland and ancient parkland trees and the herds of fallow and red deer that still roam the 2,360 acres of Park.