Örsta has one of the largest Bronze Age rock carvings in the country. Depicting two ships, it is over 3.65 metres long. Above the ships, two horses pull a four-wheeled carriage. Rock carvings are often found in this kind of location, in the centre of a large Bronze Age settlement.
From Örsta and Angarnssjöängen, the Roslagsleden trail carries on up to the sports centre Össeby IP, which offers showers and an opportunity to fill up with fresh water.
A few hundred metres from the trail, up by Brottby Gård, lies Össeby church ruin, the remains of Vallentuna's ninth medieval parish church. The church was built in the late Middle Ages, probably towards the end of the 15th century. It remained in use until 1838, when the parishes of Össeby and Garn were merged. Today the church ruin is used chiefly for summer services and weddings.
On the bridge at Brottby, Roslagsleden crosses Långhundraleden, the Vikings old waterway between Uppsala and the Baltic Sea. Today, it is one of Upplands most beautiful and longest canoeing routes, dotted with sights and organised picnic and camping spots.
To the north lies Vada, with its large burial mounds for ancient chieftains, and Brotorp, with its runestone and picnic spot. Ruins and remains, burial sites and runestones bear witness to the importance of the waterway through the ages.