A closed depression (CD) is a landform where the hillslopes encircle a common sediment depository, and the sediment eroded from the surrounding hillslopes is trapped in the system. Despite the fact that closed depressions (CDs) have been regularly reported in the literature, little research on their origin exists. Therefore, a case study was made of the morphological characteristics and genesis of CDs in central Belgium that are still visible in the landscape. Through field surveys, 26 CDs were found in a 43-km(2) study area (southwest of Leuven). Most CDs were situated on a plateau, far from villages but close to important rural roads.