About one quarter of the Netherlands lies below sea level, as much land has been reclaimed from the sea. Dikes were erected to protect the land from flooding. Previously, the highest point of the Netherlands was the Vaalserberg in Limburg at only , but with the constitutional reform of 10 October 2010 this changed as Saba became part of the Netherlands as a special municipality, and its Mount Scenery () took the place of the Vaalserberg.