One of the nicest parks in Shanghai, and once the location of JZ and Strawberry music festivals, this one's worth visiting even (or especially) where there isn't a major event on. Lots of gardens and chill spots for picnics. If you follow the trail to Houtan Park, you'll pass under the Lupu Bridge and catch a fine view of the Huangpu river. Many families come out on the weekends so it's best to find a spot early before they take it. Free entry. Open 24/7. Easy to access by Metro Line 13, Shibo Avenue (Exit 1). It's about a ten minute walk. A cab from downtown will probably cost around 50-70rmb, and take about 25-30 minutes, depending on traffic.