ChichenItza Picture 31 of 32 XCaretResort | XCaretAnimals | ChichenItza 2009:03:20-18:38:42 DMC-TZ5 4.7mm 100 F3.3 1/800 First Prev Next Last Start Stop   Equinoccio On the Spring and Autumn equinox, at the rising and setting of the sun, the corner of the structure casts a shadow in the shape of a plumed serpent along the west side of the north staircase.