Join the Philadelphia Outward Bound School for Building Adventure, its signature high-adrenaline rappel from the 29th floor of Brandywine Realty Trust’s Commerce Square in the heart of Center City. Take on the thrilling 315-foot challenge down one of Philadelphia’s most iconic skyscrapers and be one of the few rappelers to go “over the edge” for Outward Bound. Each rappel participant must raise $1,750 in order to secure a spot in this event. Your support helps us fund outdoor education programs for more than 60 Philadelphia public and charter schools.