Trains. And more specifically train whistles.
I've always been fascinated with trains and as a kid had one of the most elaborate train sets you've ever seen. The train ran through my hometown and I loved the sound of the horns and whistles in the distance.
So it was a pleasant surprise to discover them here. Bako is crisscrossed with train tracks running in every which way. Every way but south, sadly - the only track crossing the Tehachapis to LA and points south is reserved for freight.
But still, there's something reassuring about hearing the plaintive wail of the train whistles late at night, or early in the morning through the fog.
Takes me back.