Signal de Botrange is the highest point in Wallonia and in Belgium, located in the High Fens, at 694 metres. It is the top of a broad plateau and a road crosses the summit, passing an adjacent café. It is also the highest point in the Ardennes and in the European part of the Benelux.
For several decades a meteorological station was installed at signal de Botrange. Since 1999, it was replaced by an automatic station of the Royal Meteorological Institute of Belgium installed on Mount Rigi, which is between the Signal and Baraque Michel which was formerly the highest point in Belgium prior to the annexation of the Eastern Cantons in 1919.
Wikipedia https://en.wikipedia.org/wiki/Signal_de_Botrange
Coordinates 50°30'6.128" N 6°5'33.46" E