One of the most overlooked pieces of "concrete" evidence is one anomaly that is actually very large, and that makes it easily overlooked when seeking small scale anomalies. However, even though this is large, it never the less is to scale and yet right in front of our eyes. In the picture above you will see a gentle incline that travels a long way across the picture. Notice the color and texture just below the "line". It is very fine grain rock or gravel and grayer that the surrounding area. This looks EXACTLY like any graded mining ramp on Earth. In the center you will also see several black angular objects all along this line. Too small to make out detail, yet interesting enough to warrant notation. {Click image for colorized} 

This is the continuation of the SAME ridge to the right of the previous image after it passes behind a hill. This one is even more level and still has the fine texture graded look. This portion is in more direct sunlight hence the lighter color. Notice the appearance of "dust" along this section, the same effect is seen when a vehicle drives down a desert road, a series of little "puffs" There is a "plume" on the right. 
{Click image for colorized}

Round disc with sphere in center. Lines connected to wall