Fattenborg is a municipal nature reserve, which Kalix Municipality has formed to protect the unique ancient remains in the area. The area is 0.4 square kilometres in size and it is forbidden to light a fire outside designated places.
There is a car park.
Fattenborg lies between Morjärv and Töre. From road 356 between Morjärv and Niemisel you turn off southwards onto a smaller road after about 6 kilometres. Follow that road for about 5 kilometres to the reserve.