Karl X Gustafs mur, Öland, Retaining wall in Mörbylånga Municipality, Sweden

Karl X Gustafs mur is a limestone wall that stretches across southern Öland for several kilometers. The structure stands solid and continuous throughout, forming a defining linear feature that shapes the landscape even today.

Karl X Gustaf ordered the wall built in 1653, while he was crown prince; he became king the following year. It was raised to keep the royal fallow deer enclosed and ensure a dense stock for the royal hunt at Ottenby. The roughly five-kilometre wall is now broken only where two country roads pass through.

The wall represented royal authority in the 1600s and shows how power was displayed through landscape features. Today it tells the story of the relationship between the crown and local people in this island region.

The wall can be followed by exploring from Grönhögen toward Öland's southern tip on foot or by bicycle. Walking or cycling along the coastal region gives the best view of the full structure and its landscape role.

The wall runs from the Kalmarsund shore south of Grönhögen straight east across Öland to the Baltic coast, about five kilometres. Only the crossings of two country roads break it today; otherwise the limestone wall stands intact. A similar hunting wall once stood at the island's northern tip.