The dioramas of animals from around the world displayed in their natural habitats give this natural history museum an old-fashioned charm. The most popular attraction is Dinosaur Hall, with reconstructed skeletons of a Tyrannosaurus rex and some 30 others of its ilk, as well as the "Big Dig," where you can hunt for real fossils, and "Outside-In," an interactive area where kids can crawl through a log, investigate a real beehive, and touch a legless lizard. Another draw is "Butterflies!," where colorful, winged creatures take flight in a tropical garden setting. Founded in 1812, the academy is considered the oldest science-research institution in the western hemisphere and a world leader in the fields of natural-science research, education, and exhibition. It will mark its bicentennial with a year-long series of events set to kick off in March, 2012; the present building dates from 1876. That history is celebrated in the Ewell Sale Stewart Library, a trove natural-history books and artworks.