They gave us a student discount for €20.00 per person to go to the kayak tour. We showed up at the…read moretime posted at 9:10 and ended up waiting twenty minutes anyway for ther people to show up and get a run down of the general rules and expectations. The staff was super nice and talkative. They seemed very genuine. Waves and winds were high that morning and we didn't end up going to any of the grottos despite that being the primary objective of the tour. The tour guide did try to keep us entertained and brought us to one of the beaches with snorkeling equipment, but I think most people were more interested in getting back at that point. We were promised a 2.5 hour tour and it was only 90 minutes at most. Can't really blame them for the weather conditions, but it would've been nice if they had offered an incentive for cutting the tour short and not being able to actually go into any of the grottos.