(Looking South from a hundred feet or more in the air, it’s not very triangular… but it definitely has a cliff. A rather chewed up and battle scared cliff at that.) The blue stuff comething across the cliff will give way for a waterfall one of these days… There are also glowing blue (green, gold, red, orange etc) gemstones to find amid the gravel and imbedded in the walls in the mines.
This guy is ‘supervising’ the miners as they tear down  some solid stone mountains (and pocket valuable minerals while they’re at it?
~~~~~Jim