Paleontological (Middle Pleistocene) and archaeological (Lower Palaeolithic) site of Ambrona (Soria, Spain). The trenches of the excavations can be seen in the foreground and behind the <i>in situ</i> museum and the permanent exhibition buildings. Note the color change of the land, from gray (A1 to A6) to more reddish in the upper levels of the series (A7).
<a href="//commons.wikimedia.org/wiki/User:PePeEfe" title="User:PePeEfe">PePeEfe</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>