Every May, a decommissioned coal mine in Herten, Germany fills with rat-rodded Ford Model Bs, chopped Chevrolet Bel Airs, slammed Volkswagen Kombis, and custom choppers for Kustom Kulture Forever, arguably the biggest custom culture show on the European continent. The 2017 edition brought tattoo artists, a skate ramp, and two tents of late-night parties alongside the cars. Read on to find out how postwar California car culture ended up thriving in the heart of the Ruhr Valley.