To obtain this Achievement load up the MMO Map.
From the spawn point go through the arch way, round the path and leap the fence into the field. Once in the field take a left and across the stone bridge, take a left once your across, follow that path all the way round and you'll reach water and a large tree. Behind the tree is a hole in the ground, lower yourself into the hole and take the travel option.
As soon as you appear on screen you will have warped to a new dimension and the achievement will unlock.
Achievement is at 0:12