Nagrandeur

Here are the 8 steps to completing the Nagrandeur achievement on the Horde side:

The Might of Steel and Blood
1. The Might of the Warsong (from Stone Guard Brox at 86.4, 66.2 as you enter Nagrand)
2. More Lazy Peons
3. The Call Him Lantressor of the Blade
4. The Blade Itself / Not Without My Honor
5. Meet Me in the Cavern
6. Challenge of the Masters
7. A Choice to Make
The Might of Steel and Blood completed.

The Dark Heart of Oshu'gun
1. The Farseer Awaits (from Thrall in Wor'var)
2. Called to the Throne
3. Elemental Attunement / Guardians of the Plateau / Earth, Wind and Fire...and Water / A Rare Bloom*
* while in the cave for A Rare Bloom you will find A Molten Core while looting slain mobs.
4. A Wrong of Earth and Fire (from the quest item you looted in the cave in the prior step)
5. Guise of the Deceiver
6. The Debt We Share
7. The Ritual of Binding
8. The Call of Oshu'gun
9. Dark Binding / The Pale Threat (get Spiritual Matters for later)
10. The Fate of Gordawg / The Dark Heart of Oshu'gun
The Dark Heart of Oshu'gun completed.

The Shadow of the Void
1. Silence the Call / Disrupt the Rituals (get these two from any of the Shamanstones near Oshu'gun)
2. Through the Nether
3. The Nether Approaches / The Void March
4. The Shadow of the Void
The Shadow of the Void completed.

The Ring of Trials
1. Ring of Trials: Crushmaul (from Dexyl Deadblade at The Ring of Trials)
2. Ring of Trials: Raketalon
3. Ring of Trials: Hol'yelaa
4. Ring of Trials: Captain Boomspark
5. Ring of Trials: Roakk the Zealot
The Ring of Trials completed.

Trouble at the Overwatch
1. Trouble at the Overwatch (from Draka at Wor'var)
2. Obtaining Ogre Offensive Orders
3. Reglakk's Research
Trouble at the Overwatch completed.

Remains of Telaar
1. Target of Opportunity: Telaar (from Aggra in Wor'var)
2. I Help Ya Kill Dem / Shields Up! / The Blessing of Samedi
3. Shields Down!
Remains of Telaar completed.

The Taking of Lok-rath
1. Along the Riverside (from Thrall in Wor'var)
2. Terms of Surrender
3. The Pride of Lok-rath
The Taking of Lok-rath completed.

The Legacy of Garrosh Hellscream
1. Lok-rath is Secured (from Durotan in Riverside Post)
2. And Justice For Thrall
The Legacy of Garrosh Hellscream completed.
Nagrandeur completed!

There's a special place in heaven for people like you haha. Here's some links to the other quest chains for the pathfinder achievement Spires of Arrak: (http://wow.gamepedia.com/Spires_of_Arak_storyline) Frostfire ridge: (http://wow.gamepedia.com/Frostfire_Ridge_storyline) Shadowmoon Valley: (http://wow.gamepedia.com/Shadowmoon_Valley_storyline) Talador: (http://wow.gamepedia.com/Talador_storyline) Gorgrond: (http://wow.gamepedia.com/Gorgrond_storyline). Wowpedia's page on the Nagrand was broken,which is where you helped out so much, so thankyou!!

There's a vendor in each faction's main WoD city who sells the treasure maps and takes archaeology fragments. You can buy the map for each zone once you've completed the zone achievement.