…donkeys. There are donkeys that will take you up to Santorini too but in Santorini you also have the alternative of the tram or a bus. Here it’s just the donkeys.
The donkey rides are pretty controversial in the travel forums but I will note that the donkeys seemed in very good condition and decent spirits too if one can divine a donkey’s spirit…and my healthy well spirited donkey carried me up that hill!