+1 Cultural policy slot. Your Cities yield +10% Faith in Golden Age, and +10% Production otherwise. +2 Culture, +2 Faith for Holy Site, Campus, Theater Square and Entertainment Complex districts adjacent to Rainforest in your empire. Undamaged Land Combat units can be sacrificed on this tile, which gives Chichen Itza Culture and Faith yield both equal to 25% of its base combat strength (rounded down and at least 1). Unit of a single type can only be sacrificed once. Must be built on Rainforest.
+2 Tourism
+1 extra per Era that you've advanced past this Wonder's era