Mythological rivers are significant in various cultures, often symbolizing life, death, and the journey of the soul. These rivers frequently appear in ancient texts and folklore, serving as boundaries between the mortal world and the divine. For example, the River Styx in Greek mythology is known as the boundary between Earth and the Underworld, where souls are ferried by Charon. In other traditions, rivers like the Ganges in Hinduism are considered sacred, representing purity and the flow of spiritual energy. These rivers often embody the beliefs and values of the cultures they originate from, illustrating the deep connection between nature and mythology.