Rheinbrohl is a municipality located in the territorial collectivity of Bad Hönningen within the district of Neuwied. It is situated in the state of Rhineland-Palatinate in western Germany.
The town is notable for its location on the bank of the Rhine, which serves as the starting point of the Upper Germanic-Rhaetian Limes. This fortification spanned 550 kilometers and functioned as a boundary delimiting the Roman Empire. A reconstruction of a Roman watchtower can be found at this site near the river.