This history museum is housed on the grounds of Chapultepec Castle and is also known as the Caracol (snail) for its winding layout. It is filled with hundreds of paintings, murals, ceramics, furniture and carriages depicting the history of Mexico from the time of the Aztecs to the modern day, with an emphasis on the colonial era and military history. We recommend prearranging a guided tour of the castle: The rooms and exhibits are more interesting when viewed with some historical explanation. Daily except Monday 9 am-4:15 pm. M$37. In Chapultepec Park on the corner of Avenida Gandhi, with an entrance on Paseo de la Reforma, Mexico City. Phone 5061-9241.