The Iska River in Slovenia vanished overnight after residents reported hearing loud crashing sounds. CBSNews.com's Felipe Maya reports. (Video) Iska River in Slovenia Vanished Overnight The Iska River in Slovenia vanished overnight. Residents reported hearing loud crashing and drumming sounds during the night and woke up to find the river was gone. Fish were found flopping on the dry river bed. The river may have moved underground after a crack opened in the riverbed. However, no earthquake was reported. There is another video about the vanishing river