World’s highest tunnel ventilation shaft?

I don’t know if it is or it isn’t.  But this photograph was taken at the Gotthard Pass in Switzerland, at an elevation of 2106 m high in the Swiss Aps:

And hundreds of feet below this open shaft is the Gotthard Tunnel, a two lane road that lets automobiles and trucks pass underneath the Swiss Alps. It was build in 1882 and until recently one of the world’s longest tunnels.  Even from the point at where I am standing you can hear the roar of the traffic deep underground.

An amazing bit of trivia that goes directly to the heart of Swiss innovation: dynamite was invented in 1867, and this tunnel project was the first large scale industrial use of dynamite in the world.