Chichen Itza Step Pyramid - El Castillo - Yucatán, Mexico

Chichen Itza
flickr/Brian Snelson

El Castillo is the nickname of one of the most spectacular Mayan temples
that dominates the archaeological site of Chichen Itza, in the Yucatán state of present-day Mexico.

The design of the step pyramid has special astronomical significance.

Each face of the pyramid has a stairway with 91 steps,
which together with the shared step at the top, add up to 365,
the number of days in a year.

Climbing El Castillo is no longer allowed after a woman fell to her death in 2006.

http://www.touropia.com/step-pyramids-of-the-world/