30 Things to Do in San Francisco - California Academy of Sciences - Includes an aquarium, planetarium, rainforest with butterflies and birds, natural history exhibits, and interactive science exhibits. Be sure to visit the unusual green roof (entirely covered in plants). The museum is open daily 9:30-5:00 and Sundays 11:00-5:00. Tickets are $25-35. **Museum is included in the San Francisco City Pass, which provides museum discounts and cable car passes.