Rotterdam, the Netherlands' 'second city', was heavily bombed during the Second World War and spent decades before reconstruction. You won't find the classic medieval Dutch architecture here – it was swept away along with the other debris and debris of war. In its place is an architectural aesthetic that is unique in Europe, a perpetually progressive approach to construction that is clearly a result of the city's post-war, postmodern philosophy. In fact, Rotterdam is known as a city of architecture. In the few square kilometers of the city center you have a complete overview of what the twentieth century produced in terms of modern architecture.