Dupe Background and run USM at 20, 50, 0.
Mask the distant American Falls back to original.

Levels Adjustment Layer to tighten Histogram.
Mask the distant American Falls back to original.

Curves Adjustment Layer: steepen the curve drastically on shadows/dark area
of the curve.
Mask the distant American Falls back to original.
Use a gradient on the mask to bring back some of the foreground a bit.

Another Curves Adjustment Layer: drop highlights to fix
original clipped American Falls a bit.

Paint With Light.

C.Springer's Digital Grey Card action to correct WB.