Upside Down Valley - inverted sheltered valley 

This is the previous fractal turned on its head. Where there was a valley with a lake at the bottom, there is now a mesa.
But all the ravines and crevices turned into long and thin spikes. Even after some very heavy handed low pass filtering to prune most of the thinnest ones, there is still a dense forest of tall trees. Those are obscuring many of the larger, perhaps more interesting structures.

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