Caving
Why not try caving! Get a group of you together with an instructor and it’s a lot of fun. All you need is some clothes you don’t mind getting dirty and a hard hat with a light to see your way. The instructor will know which gaps the groups can fit through so, even though the holes seem small it’s amazing where you can fit through!! This activity is not for the claustrophobic though as at times there is little to no space between you and the sides of the cave. After the activity you can always jump in a river to wash off all the mud from your clothes!