Dynamic Rotterdam, one of the largest ports in the world, has a great deal to offer. Besides being a major seaport, Rotterdam is also a front-runner in architecture and culture. Hardly a month goes by without a building being finished, a square being completed or a site being cleared for new development. The city has almost thirty museums; the Museumpark combines five museums dedicated to art and architecture, including such internationally renowned museums as the Boijmans Van Beuningen and the Kunsthal. This museum area makes it convenient for those wishing to visit several museums in one day. Other interesting museums include De Dubbelde Palmboom, Schielandshuis, Mariniersmuseum (Royal Netherlands Marine Corps), Maritime Museum, Havenmuseum (unique objects from the port and shipping industry, returned to working order), Natuurmuseum Rotterdam (museum of natural history), Nederlands Foto Instituut (photography) and NAi (architecture museum).