The Maas at Rotterdam is a mouth of the Rhine; but before it can become the Rhine proper it becomes the Lek, What is called the true mouth of the Rhine is at Katwyk.

At Dordrecht again is another of the Rhine's mouths, the Waal, which runs into the old Maas and then into the sea.

The Yssel, still another mouth of the Rhine, which I saw at Kampen on its way into the Zuyder Zee, breaks away from the parent river just below Arnheim.

As a matter of fact all Holland is on the Rhine, but the word must be used with care.
If one would study Dutch romantic scenery I think Nymwegen on the whole a better town to stay in than Arnheim.

It is simpler in itself, richer in historic associations, and the country in the immediate east is very well worth exploring--hill and valley and pine woods, with quaint villages here and there; and, for the comfortable, a favourite hotel at Berg en Daal from which great stretches of the Rhine may be seen.
To see Nymwegen itself to greater advantage, with its massed houses and towers presenting a solid front, one must go over the iron bridge to Lent and then look back across the river.