Mind The Gap! Former New York Central Railroad Budd built Pullman obs/diner/sleeper "Babbling Brook" (WEBX 800007) held the markers on Amtrak Train 42 (Pennsylvanian) on the afternoon of June 25, 2017 as the train passed the famous clock tower in Gap, Pennsylvania. In spite of electrification and modern tree growth, there a still a number of scenic spots to see on the Keystone Line as it crosses Southeastern Pennsylvania.