Following an almost straight line parallel to the road you will see several passage graves, including the largest in Karleby and in Sweden: Ragnvalds Kulle. This has a chamber length of 17 metres. The name comes from a legend that king Ragnvald Knaphövde on his inaugural tour of Sweden in the 1130s rode into Västergötland without first having taken hostages as a precaution. He was murdered near Karleby and this later led to the popular belief that he may have been buried in the largest tomb in the parish. Ragnvalds Kulle has never been excavated. Approximately 80 metres south of Ragnvald’s tomb is Klövagården passage grave. On the other side is Logård passage grave (Logårds kulle).
The Falbygden passage graves are unique in northern Europe – they are some of the best-preserved remains from the early stone age, largely thanks to the lime-rich bedrock. Around 270 passage graves still exist in the region today. They make up three-quarters of all known graves of this type in Sweden. Falbygden was one of many other communities in Europe that built megalithic graves, but this was a strong and independent region which left imprints on the landscape that can still be seen 5000 years later.