cenotes
There are several fantastic cenotes, fresh water sinkholes in the limestone, found near Chichen Itza. Some of them are surrounded by lush gardens with restaurants, washrooms and showers. During a hot day, cenotes make for a great way to cool your self off in the afternoon, take a break and split up your day.
Yaxkin Spa
hacienda chichen hotel (http://www.yaxkinspa.com) offers holistic beauty rituals based on ancient maya traditions.
birdwatching
The area has excellent birdwatching opportunities. Guests at at the Hacienda Chichen have access to the hotel's bird refuge and extensive nature trails.
The Descent of Kukulcan
During the three most celebrated days which witnesses the descent of kukulcan the 19th, 20th and 21st of march, chichen itza hosts music, dances and theatrical performances organized in the interior of the site, as well as at the access door.