The report went on to state :
Archaeologist knew that the rock came from quarries at the base of a mountain nearby, but wondered how the sandstone bricks used to build Angkor Wat reached the site. Previously people thought the stones were ferried to Tonle Sap Lake via canal, and then rowed against the current through another river to the temples, Uchida told LiveScience.
To see whether this was the case, Uchida's team surveyed the area and found 50 quarries along an embankment at the base of Mt. Kulen. They also scoured satellite images of the area and found a network of hundreds of canals and roads linking the quarries to the temple site. The distance between the quarries and the site along the route Uchida's team found was only 22 miles , compared with the 54 miles the river route would have taken.
The grid of canals suggests the ancient builders took a shortcut when constructing the temple, which may explain how the imposing complex was built in just a few decades.
Read more:
http://www.foxnews.com/science/2012/11/03/mystery-angkor-wat-temple-huge-stones-solved/#ixzz2E4ozTBUX-------------------------------------------------------------
We can just marvel at this feat - how so many centuries ago, without the aid of "modern" technology, the people were able to construct such huge monuments/buildings. How were they able to move those gigantic heavy stones from the quarries via canals and to the temple site?