IBRG, Border, bordermarker, drielandenpunt, tripoint, Schengen, Germany, France, Luxembourg, DEFRLU, Europe Monument museum, buoy

DEFRLU(Schengen)

schengen

Besides all this interesting info, there's more to tell about the borderline up North from the tripoint at Schengen.

Since 1815 (Vienna Treaty) the borders are situated on both sides of the 'Moselle', on the landside. That indicates that the river itselves became than a condominium.

You can read about this here.