It looks like I'll have a 12 hour layover at FRA soon which we give me time to hop a train to a nearby place for a few hours. Departing flight is at 22:40.

I've had good luck with using a wheelchair on the Deutsche Bahn before, so am looking for suggestions on a destination that would be interesting and easy rolling.

It looks like the Gutenberg museum in Mainz would be the right sort of place, but I don't know about the accessibility.

Any other suggestions are welcome. Adjacent to a rail stop would be ideal.

Thanks in advance.