If you can walk as far as the Mudd Hall of Philosophy, then you can certainly cross the street to the Museum of Natural History. If you can make it to Trojan Hall, you'll be able to make it to Exposition Blvd. to visit both the California Afro-American Museum and the Museum of Science and Industry. The California Afro-American Museum of History and Culture is located at 600 State Drive in Exposition Park, directly behind the IMAX Theater. It features both ancient artifacts and modern art created by African-American artists. The museum is open 10 a.m. - 5 p.m., Tues. through Sun.
Admission is free.
The Museum of Science and Industry is right next door, at 700 State Drive, Exposition Park. This complex of museums is most famous for its display of air and space crafts located inside the Aerospace Building. The museum is a favorite of elementary school children who enjoy the interactive exhibits on health, weather, electricity, magnets, and earthquakes. The museum is open seven days a week, from 10 a.m. - 5 p.m. Admission is free. The IMAX Theater is right next to the Museum of Science and Industry.