Wailing Caverns is a level 17-25 dungeon in WoW Classic. It is located in The Barrens. Wailing Caverns is the first non-linear dungeon in the game.
This WoW Classic Wailing Caverns quests guide explains where you can find the Wailing Caverns in WoW Classic, which Wailing Caverns quests are available, and what loot drops in Wailing Caverns.
ncG1vNJzZmivp6x7u7vCpKCfsV6YvK571qiunKSRqMCqr46drKeflaS7tHvWmqCloZ6ceqSt1Z6pp6tf