In the 1860's King Karl XV redeveloped Hjorthagen as a park for walking and keeping animals.
Hjorthagen was developed into a deer pasture in 1890 in order to accommodate deer from the Royal Hunting Area Hjorthagen close to Värtahamnen in Stockholm.
The area is a very popular are for country rambles both for the locals and for the great number of tourists that visit Gripsholm Castle each year.
Also found in the area are the vestiges of an ancient castle, a grave-field, an order emblem in cast iron as well as old walkways and ruins. The area covers approximately150,000 acres.
The Osmoderma eremita beetle is an extremely rare insect that is found only in a few places in the county.
Rare insects that have been observed include the Corticeus fasciatus, the Larca lata, the Lymexylon navale and the Pentaphyllus testaceus.
Today it is possible to wander freely at Hjorthagen and most probably see deer up close.