First mentioned in chapter 1454.
Ancient Shrines are considerably old and mysterious locations. No one knows who built them, yet every large-scale Otherworld has them.
Ancient Shrines are extremely dangerous and are guarded by powerful monsters. They are also filled with traps. Even so, players residing in large-scale Otherworlds swarmed to these Ancient Shrines like madmen. This was due to Ancient Shrines housing the passages to travel from their Otherworlds to God's Domain main continents (Western Continent and Eastern Continent).