Minimum 20 paying persons. 1 free ticket for every 20 paying persons. If the group hires menu, 1 free (menu) for every 20 menus payment. With the combined ticket you can visit the centers when you want, throughout the 2019 season. Is not necessary to visit them on consecutive days. Essential to keep the entrance.Is prohibitedget food or drink into the park. Once you leave it, you can not re-enter.