I'm skipping the Northrend dungeons for now to get these guides for the new content out quicker, but don't worry, I will be releasing videos for all the Northrend dungeons.
Blackrock Caverns is the first instance of the Cataclysm expansion. Located in Blackrock Mountain on the border of the Burning Steppes and Searing Gorge it is a level 80-83 dungeon. You must have discovered the instance entrance in order to queue for this dungeon using the Random Dungeon Finder, as with all Cataclysm dungeons. There are five bosses: Rom'ogg Bonecrusher, Corla Herald of Twilight, Karsh Steelbender, Beauty, and the final boss is Ascendent Lord Obsidius.
This is the second instance in the Caverns of Time. You must travel back in time to stop the Infinite Dragonflight from preventing the opening of the dark portal by Medivh. The Caverns of Time are located in the eastern part of Tanaris, but there is also a portal in Dalaran that will take you there.
This is a level 68-70 dungeon. You must defeat 18 waves of enemies, each spawning at 1 of 5 random locations in the dungeon. Waves 6, 12, and 18 are the three bosses Chrono Lord Deja, Temporus, and Aeonus. In order to enter the instance you must complete The Escape From Durnhold Keep instance first.
The first instance in the Caverns of Time, Old Hillsbrad has you travelling back in time to rescue Thrall and stop the Infinite Dragonflight from altering history. The Caverns of Time are located in the eastern part of Tanaris, but there is also a portal in Dalaran that will take you there.
This is a level 66-68 dungeon. The final boss is Epoch Hunter.
I can hear what some of you are saying: "Finally, he's released a video of Maraudon". Yes I have. Sorry for the delay, it was a mix of bad luck and my terrible memory. I had originally recorded Maraudon at the same time I did Dire Maul. Shortly thereafter one of the hard drives in my RAID died and I lost all the footage (that'll teach me not to backup). I recaptured the Dire Maul run but for some reason forgot to do Maraudon again. It wasn't until a couple weeks ago when I got a few comments asking me why I hadn't done a video for Maraudon that I remembered. So here it is after a long delay.
Maraudon is a level 42-48 instance located in south-western Desolace. The entrance can be difficult to find as it is tucked away in the canyons inhabited by a clan of centaur. Once you've found the entrance to the cave things become even more confusing. There are many twisting paths in the cave, many which lead nowhere. There are two actual instance entrances, one amongst the Purple Crystals and the other amongst the Orange Crystals. To get the completion achievement you must defeat Princess Theredras; all other bosses are optional.