The day started with a wine tasting near Rudesheim at Schloss Vollrads (one of the worlds oldest wine estates going back to at least 1211), which is known for outstanding Rieslings.
Most of the day was spent leisurely cruising the Rhine Gorge and taking in many castles and countless vineyards.
Contrary to what it may appear, the castles were not built for the vineyard owners.
This area has been a major transportation route since Roman times. River barons staked out their territory and extorted toll from the ship captains.