Formations Nether adds a set of new structures to the Nether, waiting to be found while you explore the fiery dimension. The author keeps a gallery of examples on the project page.
It runs on NeoForge, Forge, Fabric and Quilt for Minecraft 1.20 - 26.3. Want Nether trips on your Minecraft server to turn up more to discover? One click in the panel installs it.