In May of 2008 I travelled with a friend to the desert Four Corners region to tour several Native American sites. I documented several sites in detail in anticipation of the release of this tremendous product.
One thing I REALLY like about this Synth is the pointcloud. It's amazing. Navigate to the front of Cliff Palace and then zoom in and out until you get the donut, then hold down CTRL and spin around. Also note, this Synth goes 360 degrees.
Some other synths from this trip that worked quite well are:
Canyon de Chelly - Spider Rock
Chaco Culture - Pueblo Bonito (646 images!)
To find these Synths, just click on my user name above.