Terraria has been out since 2011, and over the past twelve years, fans have discovered numerous ways to start their playthroughs. Normally, the world seed that Terraria generates when players start a new world is completely random, meaning everything about the world's design is out of the player's hand. Starting with the 2020 World's End update, though, the option to fully customize worlds with different world seeds was added into Terraria, giving players more control over their starting environment.
Source：https://www.cbr.com/terraria-best-seeds-according-to-reddit/
