Turning inland, west of Hudiksvall, we come first to
Tunaborg hill - a prehistoric stronghold believed to date from the early Iron Age. The local inhabitants sought shelter here in times of unrest. When Christianity became established, churches took over as the natural place of refuge. Defensive towers were often built close to churches, and
Hälsingtuna Church has a well-preserved example from the 12th century.
In the village of Hallsta is Oppigården, one of the only houses to remain intact after the Russian incursions of 1721.
Many examples of typical Hälsingland wooden farmhouses can be seen in the district.
The Uppsala kings had a royal residence in Hög, as well as an administrator responsible for collecting taxes. The countless prehistoric remains and many large grave mounds (including the so-called "King's Mound" dating from the 3rd century) bear witness to the area's illustrious past.