'Amiche' and 'Valtinche' were nicknames for railway tracks. The railway is history and cycleways are there instead. The 'Amiche' cycleway is located between Bodenheim and Selzen and 'Valtinche' between Selzen and Nierstein. It's a nice circular track from Bodenheim via Selzen, Nierstein and back. To reach Bodenheim from Mainz you can either cycle along the river Rhine or via Hechtsheim.