Moonlight Kayak Day – 8-9:30pm. Explore the tidal Schuylkill River on a kayak at night! Hidden River Outfitters leads this professionally guided tour of the tidal Schuylkill which includes equipment rental, instructions on how to paddle and safely operate the kayak, and a little over an hour out on the river. Cost: $45. Walnut Street Dock, 2500 Walnut Street, Philadelphia. https://www.SchuylkillBanks.org.