When was the last time that you were at Horseshoe Curve in Altoona, PA? Extensive work has recently been performed to trim back a lot of vegetation that had been blocking a good view of the tracks. On the morning of 7/2/2016, we catch Amtrak's Pennsylvanian on its way to Philadelphia. Use that tall tree as your marker - before April, everything to the left would have been obscured by trees.