We couldn't do it because of the rain and we wanted to change it but the guide told us that it was not possible, that even if it rained it was no reason to change it, when the next day it was an excellent day. The tour is a two-hour walk, on their website they do not mention “walking” although they do say it here.
The guide was quite rude, he didn't give us a choice or listen to us, but he did scan the code on our pass so we wouldn't try to change it. We are left wanting to do it