Medieval Fortress at Koppelpoort, Amersfoort

A historic medieval fortress stands proudly by an algae-covered moat under a partly cloudy sky. Its robust brick walls are punctuated by watchtowers topped with steep gables featuring dormer windows. A covered bridge connects to its main entrance, which is flanked by fortified towers. Red shutters contrast against white-trimmed windows, while heraldic crests adorn some parts of this formidable structure.