Altar of the Drakkari Colossus
From WoWWiki
The Altar of the Drakkari Colossus can be found in the Tomb of the Ancients in Gundrak. This altar becomes available to activate once 
Drakkari Colossus is destroyed. When activated the large golem head statue will drop into place on a rotating bridge.
This altar is one of three that will cause the bridge to turn allowing the players access to the lass boss Gal'darah.
See also
