A line up of the Railroad Museum of Pennsylvania's outdoor locomotives featuring from right to left; PRR 2-8-0 No. 7688 (tender first), PRR 4-8-2 No. 6755, PRR 4-6-2 No. 3750, and in the front yard, PRR GG1 No. 4800 "Old Rivets", and finally, an Amtrak AEM-7 - No. 915.