Royal Gorge Bridge was created in 1929.
Royal Gorge - 1903 was released on: USA: 1903
Royal Gorge - 1898 was released on: USA: February 1898
The Arkansas River runs at the bottom of the Royal Gorge. The running water in the river has carved a majority of the Royal Gorge.
Train in Royal Gorge - 1902 was released on: USA: November 1902
Might you be referring to the famed Grand Canyon? It's pretty large, though strictly speaking, it is canyon rather than a gorge.
Colorado
The address of the Royal Gorge Regional Museum And History Center is: 612 Royal Gorge Blvd, Canon City, CO 81215-1460
the royal gorge bridge is 1,053 feet deep. Wikipedia states it's 1250 in some places
Royal Gorge
Colorado
The Arkansas River.