Trollenäs Castle is known since the 14th century, and has been in the ownership of only two families, Thott and Trolle. Originally known as Näs Castle, it was renamed after Trolle family in the 18th century. The current building goes back to 1559 and was in the late 19th century renovated by architect Ferdinand Meldahl to resemble a French Renaissance castle.
There is also a medieval church, Näs old church, near the castle. The castle is open to the public, offering facilities for weddings, conferences, dinners, and other festivities. In the park there is a café.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.