I was fortunate to tour Chichen Itza many years ago (maybe 30 or so?). Visitors were still allowed to climb the Temple of Kukulkan. It was fascinating, and the trip remains one of my most vivid memories.
I know it is not in vogue to visit Mexico these days, but I would encourage anyone going to Cancun to book a bus tour trip to see Chichen Itza.
I also visited many years ago, 1966 when my parents took the family on an extended Yucatan adventure. 8 years old I climbed every one of those structures before they were restricted. Cozumel, Merida, Uxmal, Chichen Itza in the mid 60’s, truly a great trip and adventure. My long departed parents were the best...