Terraria: Secret Seeds For Unusual Worlds

Much like other sandbox type games, players in Terraria can use certain seeds to unlock easter egg worlds. These are the three included by update 1.4.

Drunk world - Terraria Wiki

Exploring Bizarre Terraria Seeds: Unveiling Unique Items & Gameplay — Eightify

Not the bees - Terraria Wiki

Best secret world seeds for Terraria 1.4

Exploring Bizarre Terraria Seeds: Unveiling Unique Items & Gameplay — Eightify

tModLoader - [Tool] The Terraria Seed Project

Terraria 1.4 Special Seeds. The new Terraria 1.4 update brought…, by Daud K. Marwat

tModLoader - [Tool] The Terraria Seed Project

Not the bees - Terraria Wiki

Terraria: Secret Seeds For Unusual Worlds