Large treasure hunt

[yourcreepyuncle]

Dude that looks sick! If I get that then I can have 50 blocks of diamonds!

[Xestia]

I've just finished the treasure hunt with the above as reward, and so we're ready to start it :D

The treasure hunt will lead you through a series of signs, that will eventually lead you to a chest.
The coordinates you should be able to calculate to will be very exact. Signs are hidden 1 block beneath the surface, to prevent people from randomly finding them.

The hint for the first chest is:

Underworld at 3 100's

Have fun :)

[yourcreepyuncle]

Awwwww I won't be able to get on at all until later tonight :( that sucks...

[Xestia]

I'm sure it will take 1 or 2 days before it gets solved. Don't worry.

[yourcreepyuncle]

Sweet!

[Gingeronamission]

I wont be able to get on for a long time... But I will win!
How can you afford to give all this away?

[yourcreepyuncle]

Are you quiting?

[FoSchnizzle]

IT'S ON, BITCHES! Only reason i want any of this is so that nobody else can have it. >:D i may give a bit away, or burn it. Depends on how i feel the day i win.

[FoSchnizzle]

One or two days my ass, Xestia.

[Xestia]

People are still struggling, I doubt they'll finish today.