Where is it?

[TPC]

@Cuppa seeing you and @TPC are the only 2 who have been here (suspicious I think...) you might as well take it and keep it rolling..

I know of at least two others that have been here and there are probably some that have and I am not aware of.
I would have thought there would be a few from the west that would have ventured up there.

So the clues so far for location are West, Up & Warm. And the picture looks like a tunnel.