Between June 15 and September 15, 2023, Monday-Thursday at noon
Prices: SEK 200, $ 20 or € 20 - Cash only. No need to register in advance, just show up when the guided tour begins. 

For big groups or private alternatives please call in advance at phone +46 708 211 897. 
Prices: Groups up to 30 people SEK 3000, groups up to 50 people SEK 4000.