At 7 PM, an NPS ranger will present "Ghosts of the Arch Grounds," a stroll beginning at the North Leg of the Arch, covering some of the changes that the Grounds have seen throughout history. This will be followed from 7:30-9 PM by telescope viewing presented by volunteers from the St. Louis Astronomical Society, taking place under the Arch on the riverfront side. Event may be cancelled due to heavy cloud cover.
Added by Upcoming Robot on October 10, 2010