Museumsinsel Berlin

In the page's words:

Museum Island Berlin in the heart of the city is a magnet for visitors from all over the world. This is the cradle of today's National Museums in Berlin, which display their outstanding collections on the millennia-old history of art and culture in Europe and the Mediterranean region in this incomparable ensemble of buildings. In 1999, UNESCO declared the Museum Island Berlin a World Heritage Site as a "unique ensemble of museum buildings illustrating the development of modern museum design over more than a century".