Lava Ocean

Lava Ocean is very dangerous and hot place. It can be found on other planets in Main World or in Hell. When you going here, the biome will instantly govt you Burning effect and all ice and snow items will melt. Lava damages you, so only way to move here is building obsidian raft. Not very many mobs can spawn here. For example Smiley Order can't spawn here, so you can pass the 50th :) border here. There is totally nothing to do except fishing for getting lava species of fish or boiling water (aka lava Ocean made tea). Basically you just can make an obsidian mountain and build your house on it, to make the safest house in andac universe but nobody done it yet, sadly.