Chichen Itza, Mayan city in Yucatán, Mexico.
Chichen Itza is a large pre-Columbian city built by the Maya civilization.
The city was one of the greatest Mayan centres of the Yucatán peninsula.
It's known for its Temple of Kukulcan, also known as El Castillo.
The site is open to the public and can be accessed via the town of Piste.
Twice a year on the spring and autumn equinoxes, a shadow falls on the pyramid in the shape of a serpent.
Location: Yucatán
Inception: 455
Website: youtu.be/17QWlrVeDk8
Sources: Wikimedia, OpenStreetMap