In a Thousand Years Even You Might be Worth Something

In an effort to assist others on their quest for this achievement here are the steps:
Complete the quest series to escape from captivity starting with Hero's Call: Uldum!

Go to Mar'at (town that is a very short distance from Ramkahen - to the SW.

Speak to "Mack" and obtain the quest, Take it to 'Em!
Upon Investigating the tomb, Harrison Jones will compelte the quest.
After which, you will begin your long quest chain for the achievement.

Here are the stages of the Achievement:

Reactivate the Obelisk of the Stars
Speak to Adarrah
Reactivate the Obelisk of the Sun
Go to Schnottz Landing, complete a quest chain there
Harrison will ask you to meet him at the Oasis of Vir'sar
You'll meet Sullah, and have a few quests to do at his sideshow
Reactivate the Obelisk of the Moon
...And finally the homestretch at Maker's Ascent in Uldum

Obelisk of the Stars reactivation:

Complete Exploding Through
Sand Pygmy Corpse gives quest Field Work

To the SE of Harrison Jones is an 'Elaborite disk" with a ! above it.
A Strange Disc

On to Something
Speak with Harrison Jones, and obtain The Thrill of Discovery

look for a Schnottz Scout with a !
obtain quest Lessons From the Past
loot the journal and spectacles from the scout
Turn items into Harrison Jones, accept quest By the Light of the Stars

Look for a Decrepit Skeleton with a !
obtain quest Be Prepared

Obtain and complete:
Tipping the Balance
After the Fall
Do the Honors

This will activate the "obelisk of the stars"

Harrison goes through a short dialogue telling you to meet him at Ramkahen.
Instead of searching for Harrison, speak to Adarrah, whom he has left a message for you.
(she is the NPC you first made contact with in Tanaris before you were captured)

Obtain quest, That Gleam in his Eye

Obelisk of the Sun reactivation:

Harrison is already at the location, accept the quest I've Got This Guy and They Don't Know What They've Got Here
Complete Ignition
Complete Tailgunner!
Obtain Efficient Excavations from a book dropped by an officer.

Upon completing Tailgunner, Harrison will "catch up with you later"
Go to Schnottz Landing and turn in Efficient Excavations. This will initiate the following chain:

From Belloc Brightblade - accept Eastern Hospitality and complete.
Accept A Favor for the Furrier, and from Schnottz accept The Desert Fox

HINT: make the following macro to find the fox very quickly
/target Desert Fox
/script SetRaidTargetIcon("target", 2);

While you are at the location, you can do Dirty Birds by killing 1 vulture to obtain the quest.
Its not required for this achievement, but its worthwhile if you're lvling or going for the uldum quest achievement.

Accept and complete the following:
Fashionism from Brightblade
Idolatry and Angered Spirits from Schnottz

Turn in and Schnottz will initiate a small chain:
Gobbles!
Make Yourself Useful - I'd suggest doing this quest on your flight mount. If the laborer resists you can simply fly upward and do this A LOT faster :)

Brightblade will have the quest Crisis Management
Complete this quest and accept Battlezone from Schnotzz.

Here's the rest of the chain all from Schnottz:
Missed Me By Zhat Much!
Lockdown! - go to the other building and accept quest The Great Escape
turn in Lockdown, and accept Sending a Message. Both are done on the ships.

Turn in "The Great Escape" then "Sending a message".

Accept quest Firing Squad and complete. This will lead you back to Harrison Jones. He will give you the quest Meet Me In Vir'sar

Harrison will send you to meet Sullah, and complete Friend of a Friend. Sullah will ask you to come on a ride with him Two Tents.
Accept quests CamelraderieUnlimited Potential
It is unclear to me if these 2 quests are needed, because on my second round of this achievement I discovered Master Trapper isn't needed for the achievement.
If you do complete all Sullah's Quests he will give you Jonesy Sent For You

I went back to Harrison before I completed the Master Trapper, and he let me go on with the quest series.

To reactivate the Obelisk of the Moon:

1. Reduced Productivity Missing Pieces
2. Stirred the Hornet's Nest
3. Shroud of the Makers
4. Schnottz So Fast
5. Bad Datas
6. I'll Do It By Hand

Obelisk of the Moon Reactivated!

THE HOME STRETCH!
1. Sullah's Gift
2. Fire From the Sky - Can get Help the Bombardier! I'm the Bombardier! here!
3. See You on the Other Side!
4. Fortune and Glory
5. Harrison Jones and the Temple of Uldum

Congratulations! You've done it!

The quest chain goes on from here, but this is all that is required for the achievement.

Another Indiana Jones (Raiders) quote, spoken by Rene Belloq to Indiana Jones just before he is sealed in The Well of Souls.

kThis is a Very long quest line that will (on occasion) leave you clueless on where to go next. I didn't track the exact quest names or the number of them but I can give you the general idea. You get a quest that will lead you to the temple of the stars where you first meet him. He will lead you to complete a few quests inside the temple. After you complete that area it will seem to drop off. At this point you need to go back to Ramkahen and speak to Adarrah (54.3, 35.2) who will give you a quest to meet up with Jones at the temple of the sun. After completing the "Tail-gunners" quest it will seem to drop off again but you will actually have to complete another quest line at Schnotts landing. Jones will meet up with you at the end of it and lead you to meet him at (27, 8). He will have you do several quests in and around the Obelisk of the moon. The final one there will lead you to the top of Pilgrims Precipice where you have a vehicle quest. This is where you can get the ach "Help the bombardier. I'm the bombardier". The next past has "Meet you on the other side" where you fight the obsidian colossus (elite with 1549k health.) It will go to a cut scene (one of MANY) that will phase you to the final quest turn in. There you will get the achievement and most likely the ach (Unearthing Uldum)

This quest line is highly based off Indiana Jones and has many very well done cut scenes and phases. This quest line will make or break the area for you.
Hope i was helpful. 1549k