Belgium is not as boring as its known reputation in Europe really. It just has a really bad weather all year around. It is actually really nice on a sunny day. The cities of Brussels, Gent, Brugge and others have great architecture and buildings.
Cities: Brussels, Brugge, Namur, Ghent, Leuven.
Attractions: Royal and grand palace in Brussels, Atomium park in Brussels, Pissing boy, Brugge canals, Waterloo battlefield.