Procedure: pick-up at the hotel, briefing for the kayak tour, drive to the grotto/cave (we got an upgrade and were allowed to see it for free), lunch, kayak tour, return to the hotel -well organized -delicious lunch (also vegetarian) - nice guides Please note: this tour is not suitable for people with claustrophobia (in the cave you sometimes have to crawl through) and for people who get travel sick easily!! We sat on the back of a semi-open pickup truck for almost 2 hours for the drive. The route is bumpy and partly curvy. It was driven very fast and we constantly inhaled the exhaust fumes from the other cars. You should definitely be aware of this beforehand. Apart from these aspects, we still found the trip to be a success.