What is hidden behind the usual names of rivers and lakes - Moscow, Yauza, Neva, Kama, Ilmen, Baikal? Where did these words come from, and what do they mean? Why are there more White and Black rivers and lakes than Blue, Yellow and Green? Is the Tarakanovka river connected with cockroaches? What does the Lama River have to do with the city of Volokolamsk?