Koppelpoort

"Amersfoort is a small city close to Utrecht. The main highlight here is the gate (which looks more like a castle) over one of the canals. Another gate with a tower can be found on the opposite side of the city centre. In general, if you enjoy admiring historic houses and cute little streets, you'll want to stroll around the 'Muurhuizen' street. Besides the canals and parts of a defensive city wall, Amersfoort is home to serveral buildings designed by a renown Dutch architect Gerrit Rietveld. For example, the 'Rietveld Paviljoen' is now a moden art gallery. Similarly, there is a museum dedicated to abstract painter Piet Mondriaan. Funnily enough, both Rietveld and Mondriaan where fan of using mainly primary colours (blue, red, yellow)."