The Angstel is a small river between Abcoude and Loenersloot in the Netherlands, about halfway between Amsterdam and Utrecht. The Angstel is about 6 km (3.75 mi) long and connects the Gein and Holendrecht rivers with the Aa and Winkel rivers. East of the Angstel is the Amsterdam–Rhine Canal.
Castle Loenersloot on the Angstel, ca. 1668