The Hungarian River is composed of two rivers, the Eger and the Raab. The Eger is a tributary of the Tisza, which is the longest river in Hungary. It is approximately 200 kilometers long and flows through the city of Eger. The Raab is a tributary of the Danube, which is the second longest river in Hungary. It is approximately 250 kilometers long and flows through the city of Győr. Both rivers are important sources of water for the country.