If you have time to see only one museum in Mexico City, this world-renowned anthropology museum is the one to choose. The most fascinating exhibits include the Aztec calendar stone, giant stone Olmec heads from the jungles of Tabasco, treasures recovered from a sacred Mayan well, a replica of a Mayan ruler's tomb from Palenque and ethnological displays of rural Mexican life as it is still lived today. It also has a good model of the location and layout of Tenochtitlan, which puts present-day Mexico City in perspective. Daily except Monday 9 am-7 pm. M$48. Free on Sunday. Tours after 7 pm can be arranged (phone 5553-6381 or 5553-6386). In Chapultepec Park at the corner of Reforma and Gandhi (Chapultepec metro station), Mexico City. Phone 5553-6266. http://www.mna.inah.gob.mx.