Äventyrsbanan Stockholm

I went here to walk the «high altitude path» as part of a bachelor party and I must say it’s a great activity for groups of friends and team building.
The instructors are friendly and inspire trust (which is needed because security is important).
The climbing and and walking around the high altitude path is a great way to face your vertigo. I had a high heart rate throughout but it was a great experience.
There are some logs lying around a fire place where we wanted to grill some hot dogs afterwards, and they lent is grilling equipment even though they were leaving, trusting us to put the grilling equipment by their cabin when we left later in. Very nice of them.
They also have sauna, sleeping accommodations and other activities beside the high altitude path. Check out their website for more info.