The Hnilec (), ) is a river in Slovakia. Its source is located below the Kráþova hoþa mountain, Low Tatras. It flows into the Hornád river near Margecany. The Palcmanská Maà ¡a dam is located on the river near Dobà ¡iná. Places of interest along the river include Dobà ¡iná Ice Cave and the Slovak Paradise. It is long and its basin size is .