One of the finest museums in the world, the Field Museum has exhibits that trace the natural history and the biological and anthropological aspects of our cultures and environments. To a child, that means mummies, dinosaurs, Native Americans, extinct animals and exotic lands. You'll fall in love with Sue, the largest and most complete Tyrannosaurus rex skeleton ever found. It (they don't know if Sue was male or female) towers over the main hall. An interactive video explains how Sue was found and put together. The museum is best seen on several visits—otherwise, it becomes overwhelming. Daily 9 am-5 pm, last admission at 4 pm. US$12-$25 adults, US$7-$12 children ages 4-11. Some of its 52 discount days fall on Monday and Tuesday January-May, September and October. 1400 S. Lake Shore Drive (at Roosevelt Road), Chicago. Phone 312-922-9410. http://www.fieldmuseum.org.