The Hill rises near the highest point in Belgium, the Signal de Botrange and empties into the Vesdre (Weser) at Eupen, 25 kilometres further north.

This village is interesting for geological reasons: in a stone quarry there is the only rock of volcanic origin in East Belgium.

The Soor discharges into the Hill just before Eupen, at a place called the Black Bridge (Schwarze Brücke).

From 1815 to 1919 it divided Prussia from the United Kingdom of the Netherlands and its successor state, Belgium.

In 1952 a 1.5-kilometre-long link tunnel was dug between the Hill and the Eupen Weser Reservoir, in order to better regulate the high water demand of the textile industry.