Iselsta is a clustered village that has its roots from the Middle ages. A clustered village was built from within. Houses were built in a circle and on the outer circle layed the stables, barns etc... After that came the fields and the pastures. The oldest house that stands there today was built in the beginning of the 18th century. Around Iselsta lie several types of graves from the younger Iron Age. An example of a gravefield from the younger Iron Age lies just at the main road. On the other side of the road are the memories from the older Iron Age more dominant. Two things stand out, an ancient castle which was probably built by the end of the older Iron Age and a ‘Domarring’ (the exact meaning of that is ‘judge-ring’ and it is a rare kind of grave). There is also a runestone close to Grödinge Bygdegård.