Excursion cruise on the Rhine
Excursion cruises are a popular tourist activity in Germany. In particular, an excursion cruise on the Rhine is well-known to tourists from foreign countries. Koblenz is conveniently situated for people who want to join an excursion cruise and it was the only reason that we stayed in Koblenz!
First, we got on a train from Koblenz to Mainz in the morning.

The train took the scenic route through the Rhine Valley and passengers can enjoy the scenery from the train's window. Some famous castles along the Rhine are evident and it's even possible to see the Loreley, which is the one of the attractions of the cruise.

Bacharach
We got off at Bacharach. Our itinerary was to walk around Bacharach, enjoy the local wine and take a cruise ship back to Koblenz.

Bacharach is a tiny small village to the left of the Rhine. It is located north of Frankfurt and south of Koeln, between Mainz and Koblenz.
The train station in Bacharach is at the south end of town, so to get to the town center when you get off the train, just cross the level-crossing and turn left and walk north along the river.

Within 5-10 minutes walking with Castle Stahleck on your left, you'll see some car parking lots and tunnels into the town center once or twice.

There is a big parking place with a big wine cask nearby a ticket office for excursion cruises.

The tunnel through the market tower (Marktturm) , right across the street from this car park, is the most convenient to get to the town center.