Château du Haut-Kœnigsbourg

Restored medieval mountain castle with sweeping views over the Alsace plain. A serious climb (~550 m up from the vineyards) — e-bike friendly, or lock the bikes in Kintzheim and take the shuttle from Sélestat (seasonal).
From the route
Leaves the route in Sélestat on day 2; 8.5 km one-way with 550 m of climbing on paved road.