The rock carvings in Glösa were described as early as 1685. The carvings are estimated to be 6200 – 5500 years old. Some 60 figures – all depicting elks – were carved into the rocks surrounding the stream by prehistoric trappers. It is believed that the petroglyphs of Glösa could be 3000-4000 years older than the oldest known rock carvings in southern Sweden, which were made by farmers during the bronze age. There is an open-air museum called The Glösa rock art center.References:
Frösöstenen is the northern-most raised runestone in the world and Jämtland's only runestone. It originally stood at the tip of ferry terminal on the sound between the island of Frösön and Östersund. The stone dates to between 1030 and 1050. It has now been relocated to the lawn in front of the local county seat due to the construction of a new bridge, between 1969 and 1971, on the original site.
Frösö runestone inscription means: Austmaðr, Guðfastr's son, had this stone raised and this bridge built and Christianized Jämtland. Ásbjörn built the bridge. Trjónn and Steinn carved these runes.