General Admission Only Tours depart promptly at their scheduled time. Please arrive early to facilitate security screening. If you arrive late, there are no guarantees tour guides will wait for you or your party. Tour guests will enter doors just south of the Pro-Shop off Occidental Ave. Signs will direct you to the appropriate door. Please visit the Pro-Shop if you are having difficulty locating this door. There is no extended field access on the tour route. All sales are final. There are no refunds or exchanges into future dates or times.