Follow the stairs down and exit downwards onto the chain at the bottom. If you enter from Searing Gorge, climb up on the giant chain that appears to your left and go down onto the big rock suspended in the center. To get to BRD, enter Blackrock Mountain from either southwest Searing Gorge or northwest Burning Steppes. BRD is also home to the Black Forge and Black Anvil, which were required to create raiding gear (primarily fire resist). A quest completed in BRD allows you to teleport into MC, negating the need to run 40 (or quite a bit less these days) raiders through the instance just to enter. A portal to the Molten Core is fairly deep into the instance, but it's mainly for show. There are lots of interesting features inside that once played a big role but currently get overlooked. It contains a multitude of bosses and quests that range in difficulty from the low 50s right up to 60 and, back then, was the first instance where a substantial amount of the loot would last into the post-leveling end-game.

It played a large part in the pre-expansion end-game, back when the level cap was 60. Comment by ataylorBlackrock Depths is the largest instance in the game.

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