Certificate for four Climbing Day Passes with gear, including bouldering and autobelaysds.  It is sure to be a climbing adventure.  Petra Cliffs, located in Burlington, boasts an extensive indoor climbing facility designed to appeal to climbers of every level.  Add indoor and outdoor classes and excursions taught by the area's best and brightest instructors, and it is immediately clear why Vermont chooses Petra Cliffs Climbing Center & Mountaineering School.