Kastad Kulle Nature Reserve is easily noticed as a hummock on the surrounding plain. This lime-rich drumlin offers an exciting and unusual flora that normally belongs to the eastern Steppes.
On Kastad Kulle you will find a special dry meadow flora that dates from a time when Östergötland had a different appearance. The very rare Hairy Milk-vetch that grows in the southern part of the reserve, is only known to occur at five other sites on the Swedish mainland and all of these are in western Östergötland. Among other plants growing in this environment are Tufted Milkwort, Salad burnet and Small Scabious.
Some of the birds that thrive among the bushes and thickets are Red-backed Shrike, Winchat, Whitethroat and Blackbird. This is where Roe Deer and the Hares seek refuge.
From the top of Kastad Kulle there was always a good view of the surrounding plain and this can explain the interesting ancient monument left here. There are three groups of standing stones and a stone circle that are likely to have been the remains a larger Iron Age burial field.
Kastad Kulle was formerly used for grazing, cultivation, haymaking and gravel pits. After nearly 40 years of neglect it became overgrown with thickets. The thickets are now gradually being removed and in the year 2002 grazing is to be re-established to encourage those rare plants that cannot survive overgrowth.
The reserve extends to 3.5 hectares and is owned by the State.