For those of us in Southern California there’s a similar attraction in the San Gabriel Mountains called the Bridge to Nowhere [1] along the East Fork. It was originally built in 1936 (for the gold miners IIRC) and then a massive flood in 1938 wiped out all the roads leading to it along with the miner camp. Afterwards engineers figured it wasn’t worth building anything there because the floods would continue to destroy them.

[1] https://en.wikipedia.org/wiki/Bridge_to_Nowhere_(San_Gabriel...