Normal Amsterdam Level - Free Audio Guide

The Normaal Amsterdams Peil (NAP) serves as a vital historical elevation reference in the Netherlands, established in 1891 from the earlier Amsterdams Peil based on the IJ river's average levels in the 17th century. NAP is important for understanding land elevation in a predominantly low-lying country. Visitors can see the NAP reference at the City Hall in Amsterdam, where peilmerken are displayed. The site is usually open during daylight hours, with free admission. It's a must-visit for those interested in history and geography, and public transport options ensure good accessibility.