Ancient hermitages left behind by saints of bygone eras, remnants of sects that vanished a millennium ago, often concealed within the human realm due to resonances between array patterns and the energies of Heaven and Earth, isolated from the world.
Daoist sects that have preserved their legacy for over a thousand years refer to such sites as the "Heavenly Origin Secret Realm".
Over time, all the major sects adopted this term.
For major sects and noble families, Secret Realms weren't exactly "rare" entities; many major sects had more than one Secret Realm within their domain, such as the Da Sui Sword Palace where numerous disciples could cultivate within the blessed lands... For Cultivators, reaching a certain level in their cultivation meant resonating with a particular Dao, which allowed them to alter the characteristics of a small part of the world. Great Practitioners who reached this state had the qualifications to create their own "Secret Realms"!
In other words,
