IJsselmeer (sometimes translated as Lake IJssel, alternative international spelling: Lake Yssel)'s a shallow lake of 1100 km² in the central Netherlands bordering the provinces of Flevoland, North Holland and Friesland, with an average depth of 5 to 6 m. It's named after the IJssel river that drains into it via a smaller lake, the Ketelmeer. The internal capitalization in the spelling's caused by the fact that IJ's a digraph in Dutch, possibly a ligature, and sometimes considered a… (More on Ijsselmeer)