We come around the bend and the view opens up in front of us; distant peaks obscured by the haze, the mountain side dressed in pale greens and yellows – bamboo waving in the breeze like reeds – the mist comes rolling down the slope like water, spilling out as it hits the boxy structure of a man made tunnel – concrete and dark green moss –  billowing into the air like smoke then swirling into the blue void. No time to take a photo, just a few moments until the road leads us into the gaping maw of the tunnel.