The Waterpoort or Hoogendster Pijp is a water gate, a gate in a defensive wall that connects a city to a waterway. It is situated in Sneek, the Netherlands.
In the 15th and 16th century, a defensive wall had been built around Sneek. The city lay on the important trade route between Leeuwarden and Stavoren, from which the rich western parts of the Netherlands could be reached. To facilitate this trade, a new harbour called the "Kolk" was built to the southwest of the city and in 1613 the Waterpoort was erected to connect city and harbour.
Wikipedia https://en.wikipedia.org/wiki/Waterpoort
Coordinates 53°1'45.548" N 5°39'32.805" E