Uxmal is located about 50 miles south-west of Merida, and will take a few hours to explore thoroughly. There is a small museum at the entrance, as well as a snack bar, gift shops, restrooms and various local vendors. Be sure to bring a hat, some sunscreen and good walking shoes. A camera is probably a good idea as well, as the buildings at Uxmal are very photogenic. The site is open every day to the public from 8 a.m. to 5 p.m.
Organized tours are also available from a variety of companies.