https://inspire-wms.maanmittauslaitos.fi/inspire-wms/HY/ows?service=WMS&request=GetCapabilities

From the dataset abstract

NLS-FI INSPIRE View Service for Hydrography Theme is an INSPIRE compliant Web Map Service. It contains the following harmonized INSPIRE map layers: Land-water Boundary, Waterbodies, Man-made Objects, Hydro Point of Interest.

The service is based on the NLS-FI INSPIRE Hydrography Physical Waters dataset. The dataset is administrated by the National Land Survey of Finland.

Source: NLS-FI INSPIRE View Service for Hydrography Theme