Continuity mistake: When Tulio and Miguel steal the row boat, Miguel is wearing shoes all the way up to saving the horse, then he climbs back into the boat without shoes. They magically reappear just after the shark eats the seagull, then Tulio is barefooted the whole time up until the same scene. Shortly after reaching land they're barefoot again and then the shoes reappear again when they're following the trail.
Continuity mistake: After Miguel unintentionally kisses the skull, the cracks on the skull change between shots.
Continuity mistake: When Miguel and Tulio jump out of their rowboat yelling "It's land." you can tell there's nothing on the beach. But then they kiss the sand and a skeleton has appeared.
Continuity mistake: At the start of the ball game Tzekel-Kan puts the ball down on a flat surface, shouting "Play ball.' But in the next shot there are a couple of tiny pieces of rock near the ball.
Continuity mistake: When Miguel and Tulio first arrive at the El Dorado island, the moss and plants near Whistling Rock (shaped as an eagle's head) change between shots and also change later in the film.
Continuity mistake: The shape of the spear that Tzekel-Kan's assistant has, changes in the scene where he first sees Miguel and Tulio next to the waterfall.
Continuity mistake: After Tzekel-Kan pushes his assistant into the potion, the bowls and items that were there previously have vanished.
Continuity mistake: When Miguel kisses the skull after arriving at El Dorado's island it is facing towards the ocean. But when Cortes arrives later on, it is facing away from the ocean.
Continuity mistake: When Miguel and Tulio are sailing out of El Dorado and almost hit a stalactite, between shots the stalactite becomes more pointy.
Continuity mistake: When Miguel and Tulio first arrive at El Dorado, the volcano is visible near the palace, but it disappears later in the film.
Continuity mistake: Altive kicks Tzekel-Kan's jaguar-like monster in the eye, leaving several cracks, The cracks constantly change between shots, particularly in the scene where the monster has cornered Miguel and Tulio at the edge of the cliff over the water.
Continuity mistake: When the two men are under the deck planning an escape, Tulio has a black eye. A little later, when they are escaping by boat, the black eye is gone. A black eye would have taken longer to heal.
Continuity mistake: The skull that Miguel and Tulio meet at the beginning, is very obviously different to the one Cortes crushes later on.
Continuity mistake: When Miguel is feeding the birds, they switch position between shots.
Continuity mistake: During the scene when Miguel and Tulio are having an argument, Tzekel-Kan, who is listening to them, changes position between shots.
Answer: The high priest's name is Tzekel-Kan.