The little brother to Chichén Itzá in the family of the Yucatan's ruins is Uxmal. It's still a stunning place. These less crowded grounds offer space to slowly reflect on the daily life of the Maya and their religious ceremonies, lively (and often brutal) sporting events, civic centers and deep connection to the cosmos.
I went with on an individual tour with a Spanish-speaking guide. It was worth it to talk through the details of the architecture and the pre-Colombian rituals.