The Horseshoe Curve is now a national landmark. Here's the entrance and gift shop, through which you must pass if you want to go the side of the fence from which I took the photo.
To go up to the viewing area, you can either ride a funicular or climb up the stairs, which start behind the clock tower.
I got to the top of the stairs just as an eastbound (and downhill) Norfolk Southern freight train started to pass through.
Serving as a trackside monument is the retired Pennsylvania 7048 diesel-electric locomotive.
This is the old watchman's shanty.
Here's a look down the funicular tracks. Connected to and behind the lower funicular station is an exhibit hall.
This is the view to the east, toward Altoona. Of the two bodies of water, the more distant is the Kittanning Reservoir.
After a while, a westbound (and uphill) NS train pulled into the curve.