The Sea King's Ancient Tomb, to be precise, should actually be the Sea King's Hall.

There was originally a great Dao realm ancient king of the sea to build a palace for himself, once attracted all the demonic beasts in the sea to worship, and became a party of power, comparable to several holy places and ancient families. Later, this ancient king's lifespan dried up, he buried himself in that palace, so, after the era will be called that palace for the sea king's ...