The Varrock sewers is a large dungeon underneath Varrock which you can enter through a manhole. This dungeon has many different monsters including giant rats, zombies, skeletons, ghosts, deadly spiders and moss giants. The deeper you go, the more dangerous will it be. This dungeon is one of the most popular dungeons in the free worlds. In the chamber with the ladder to the bear, there is a rune spawn with many basic runes. South in the Deadly Red Spiders chamber, there are two respawns of Red Spider Eggs.