The NS HiSpeed railroad bridge spanning the river Hollands Diep at Moerdijk.
The tunnel below the A16 highway in the far South of the country connects the city of Breda with the town of Prinsenbeek. The highway itself leads to Rotterdam (North) and Antwerp (South) a.o.
Right next to the A16 highway there's this view point called De Bliksemschicht. It's basically a stylish metal ladder with a nice view at the top.