This is area is really interesting to visit. It is not easy to identify the particular points in the map above. DEDELUFR bring the most straightforward. It is possible to approximate the position of the triline and the whereabouts of DELUFRLU. In 2011 I managed breifly to access the island was not able to explore. In 2018, access to the lock side incurred the wrath of the French lock keeper.

Nevertheless, lots to see and explore, with the bridge between Luxembourg and Germany, the border between France and Germany with road and rail crossings and old border markers to discover. Being part of the IBRG visit in 2018 meant I found some markers that eluded me in 2011, but also I found that an old DE/FR marker had disappeared in the interim.

The French geo portal map below incorrectly draws the border between France and Luxembourg at the edge of the island whereas it ought as indicated on the Luxembourg map follow the Thalweg (middle of the river).