In Celtic mythology, the name of the otherworld realm where heroes go after death is Annwn. This enchanted realm is depicted as a paradise of eternal youth and bliss, providing solace and peace for valiant souls. Annwn often represents the afterlife and serves as an ideal destination, contrasting with the struggles faced in the mortal world. Tales of Annwn reflect the values of heroism and honor, celebrating those who have achieved great deeds in life.