Recover the Lens of the Sun.
Provided Item:
Description
This guy just won't go down!
You're doin' great, kid. Only one thing left to do.
According to my research, there should be a titan statue down below. Use the device to activate it, then break it down.
If my theory is correct, that statue holds the key to reactivating this obelisk.
Reward
Also, you get:
8 60
Progress
Time to see if this old mechanism still works...
Completion
According to Harrison's notes, placing the lens upon this dais should re-activate this obelisk.
Exactly what that means remains to be seen...
Gains
Upon completion of this quest you will gain:
Additional Information
