This is the most common biome you'll find in the underworld. This was also the only biome available before the 1.16 Nether update. Subterranean waste consists mainly of subterranean waste, and often has lava seas extending to great distances. First, let's look at all the materials that can be collected in this biome.

This common biome also has the chance to contain a bunker and fortress remains. These are two fortresses full of enemies and rare loot.

Overall, it's a very simple biome navigation that you're sure to know once you get into one. This ecosphere is remarkably devoid of scenery.