A popular tourist place at the border of Germany, Belgium and the Netherlands. Interestingly, the spot is also the highest point of the Netherlands. If you want to get a great view of the whole "tripoint" area, head to the Belgian side - there is a tower you can climb.
Wikipedia (Dutch) https://nl.wikipedia.org/wiki/Drielandenpunt_(Vaals)
Official Website https://www.drielandenpunt.nl/
Address (Unnamed Road), 4851, Belgium
Coordinates 50°45'15.435" N 6°1'15.632" E