There are hundreds of ancient flood legends around the world that tells of vast inundations in ancient times caused by catastrophic events. It's often assumed that these legends refer to the flood of Noah and his ark. Although many do mirror this biblical story, some people say these legends simply refer to local floods that only affected the world of the locals, not the whole globe. There are three types of flood legends: global, local, and a confusion of global mixed with local floods. We sorted these legends into categories, presented the evidences, and exhibited the causes of each type. From this discussion emerges a frightful picture of the ancient world where civilizations were affected time and time again by vastly destructive cataclysmic events. The world changed-mountains rose, continents shifted, cities and islands sunk, species were obliterated, and whole populations were wiped off the face of the earth. Legends regularly validate others as true histories. If the floods they spoke of were not global, their effect was. This roller coaster ride of evidence will challenge the worldview of ancient and geologic history that have been taught to us. Legends of the floods often mentioned God or the gods, which were considered to be either responsible for the floods or saved people from them. The age when the gods ruled is associated with advanced technology and flood legends. Atlantis is considered central in flood legends, and many researchers have incorrectly linked its destruction with all flood legends. The gods, too, are related to Atlantis and are frequently tied with floods, which necessitated a section devoted to the age of the gods wherein we discover their origins and who they are.