I TRIED to take the Duquesne Incline when I first got to the ‘Burgh. I paid, got in, looked up, then told the ticket guy the next person gets a free trip.
It looked like it was 90 degree from inside and I have a terrible fear of heights.
The Duquesne Incline (one I posted pic of)is actually pretty tame with a 58% angle... The Monogahela Incline (not that far from the Duquesne) which isn’t as pretty to look at, the cars aren’t the pretty red caboose looking but more of a creame boxcar shape, actually has the steepest angle of any incline in the US at a whopping 78% grade.