The long-lost city often mentioned in myths is Atlantis. Described by Plato, Atlantis is said to have been a powerful and advanced civilization that eventually sank into the sea as a result of its own hubris. The story of Atlantis serves as an allegory for the consequences of moral and societal decay, capturing the imagination of generations. Its legendary status has spurred countless myths, theories, and explorations, representing humanity's fascination with lost worlds and the notion of decline in civilization.