Chichen Itza

Image 1 in answers is from Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Zocalo_cathedral.jpg 

Attribution: Adrian Sampson from Bainbridge Island, WA, USA  

License: Creative Commons Attribution 2.0 Generic

Image 2 in answers is from Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Tikal_Giaguaro.jpg

License: GNU Free Documentation

License https://creativecommons.org/licenses/by/2.0/deed.en

Image 3 in answers is from Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Machu_Picchu,_Peru.jpg  

Attribution: Pedro Szekely at https://www.flickr.com/photos/pedrosz/

License:  Creative Commons Attribution-Share Alike 2.0 Generic  

Image 4 in answers is from Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Chichen_Itza_3.jpg  

Attribution: Daniel Schwen 

License: Creative Commons Attribution-Share Alike 4.0 International

Image in Explanation is from Wikimedia Commons:  https://commons.wikimedia.org/wiki/File:El_Castillo,_Chichen_Itza.jpg

Attributed to: ZuyuaT

License: Creative Commons Attribution-Share Alike 4.0 International