Diablo is "devil". Yea, yea - I know, living in the shadow of Mt. Diablo (Devil Mountain) is kinda weird...
Everything around here is "Diablo" - the valley I live in, the school districts, businesses - devil this, devil that.
I used to wonder about all the references to the devil in landmarks. The devil's soupbowl, devil's mount, devil's this that and the other, an one day I was reading about one such locale which I can no longer remember, but I can probably find it. It was in a place where a battle took place, and it was a reference to all the suffering and dying of war. But a mountain, I'm not sure how that happened, but the idea of war does open up possibilities.
Ollie, I've been to Lookout mountain. Very nice.
Tib, I think I know what you mean. But truthfully, a goodly portion of America and all around the world would deserve that description as well, I'm afraid!