Over 10,000 outrageous sea creatures and fun river critters await you at the World Aquarium as well as unique land animals like sloths, alligators, two headed snakes and two-headed turtles. You can feed stingrays, pet a shark, get a fish manicure, or slide through the shark tank. Admission: $7.95 per person (in addition to basic City Museum admission-$12/person.) Hours of operation: Wed & Thurs 9am-5pm; Fri & Sat: 9am-11pm; and Sun: 11am-5pm. (Summer hours include Mon-Tues 9am-5pm) 314-647-9594.