I was lucky enough to be invited on a school trip around Croft Quarry in early 2016. The quarry organise many trips for local schools and the visits are quite breathtaking.
One of the strange things was that as the minibus was driving down the roads carved in to the quarry, we were driving on theright, not the left. This is because all the staggeringly large vehicles are left hand drive, so it gave the driver (way, way up above us) more of a chance of spotting the bus. There was also a safety flag / roof whip for good measure!
These giants were a few hundred yards away when we were parked at the bottom of the quarry (well below that waterfall).
Monochrome seemed the right choice somehow