All 3 cities are along the Rhine

In particular Fort Pannerden, where it is still called the Rhine. Other parts along several branches of the Rhine delta (Waal, Lek, Kromme Rijn, ...)

Along the Lek, within the Rhine Delta

About 7 of its locations can be considered as 'along the Rhine', with the Insel Werd being in the middle of the river.

"Following the left bank of the Lower Rhine River" (AB ev)

Limes ends at Rheinbrohl