We visited Cenote Hubiku after receiving very good recommendations from the staff at our hotel in Valladolid, who kindly gave us a courtesy coupon that included vests and a locker when visiting the site. At the entrance to Ejido de Ek Balam, the people in charge of the tourist office and the entrance offered us information about the archaeological zone and the cenote, where we made the payment for the package that included the entrance to the cenote, the food buffet, and vests and a locker in the cenote (courtesy of our hotel). After a warm visit to the archaeological zone of Ek Balam, we went to Cenote Hubiku, where upon entering the cenote to sweem they tried to surprise us by saying that we had to pay for the locker. When arguing with the person in charge, she tried to support her argument by showing me an image of the payment receipt altered with an electronic cross-out on a cell phone photo of the payment receipt and an added comment that said in Spanish, "the locker was added by mistake." When I mentioned that I did not agree with this alteration and that it seemed to me that she had altered it, I suggested that we go to the entrance window of the cenote park to see the original document that had been given at the entrance. The person in charge refused and I suggested that I would go then to ask the person at the entrance to accompany me to clarify the matter at the cenote itself. When I was preparing to go up the stairs to go to the entrance, the person in charge caught up with me and gave me the key to the locker without giving any further explanations or arguments. I comment and share this, because apparently we were not the only tourists (especially those who do not speak Spanish or do not speak it fluently) who were surprised by this action. It seems that this is a way of operating to make some extra money (individually). This is sad, because it tarnishes the good name of the place and the exceptional work of many other people who work in the area and in the cenote park itself. I turly recommend taking photos of your payment receipts and not being intimidated by anyone who tries to surprise you with an extra payment. Otherwise, the cenote is extremely beautiful and you can swim very comfortably. The showers and changing rooms are clean and the buffet (especially the cochinita pibil) was delicious. The visit to the archaeological zone of Ek Balam in combination with the Hubiku cenote is very pleasant and I highly recommend it. Be very careful with your payments.