4-6-6-4 "Clinchfield 676" crosses the Copper Creek trestle in western Virginia in the 1992. CSX borrowed Union Pacific's Challenger and repainted/renumbered it into Clinchfield livery for that year's Santa Train. (Clinchfield had its own 4-6-6-4s years ago but none were preserved.) The trestle is 185 feet high.
https://bridgehunter.com/va/scott/bh42858/