[nicephotog (OP)]

Found something disturbing on Google Earth imaging.

A complete army of 40 thousand Persian soldiers was supposed by Greek historian Herodotus to been destroyed by a sand Storm and disappeared on the way to attack the Ammonites of Siwa in egypt 524 BC.

To bury the Persian army of 40,000 would be "something like" 30 meters wide and 700 meters long!

This series of mounds or pits appear to go for more than two Kilometers.
These appear to cracked open and probably covered (sealed) by sandstorm, not by the people piled  the rocks!

In the following, the closest town of "Farafra" 47 Kilometers and a farming enterprise 28 Kilometers.
Anything else would be insane to bother to reach that area.

However, there are dug out pit "massive open cut" alike mining earth works occuring in it cutting through what appears to be Kilometers of ancient graves at least! (Perhaps the works are illegal grave robbers by method is what it seems).

Although there appears to be aka junk there over the 2km by 2km area, it would be a massively expensive and dangerous hike by vehicle simply to put any garbage there any time in history.

What makes this disturbing is that there are many shapes (unfortunately very indefinable for assurity) that are from masonry that is ancient. Note, the rocks(on the pit or mound)  though a little squarish are natural to the area and the wider region.

Google Earth or map coordinates for search bar. Look carefully it's one long trail through there.
The measurement legend bar should be showing 5m or around 18ft
Also, Google Earth has what it calls a "history bar" with notches to select the satellite image year.

NOW found an excellent example !!!!
Try to carry and leave this behind in the middle of nowhere and itself solid rock!
Hmmmmm .... just wanted one, too heavy ... best drop it... (Would require a crane to drop it !!!)
27.429845,27.629628
27.423406,27.623459
Also, this massive masonry statue piece is wearing a "square shape hat" !
There are plenty more of these around it in the area.
Trouble about Google so legend distance is difficult about its accuracy to ground size or distance at close range can be one third to twice the size.
Seems to be 30 meters by 15 meters and the area is loaded with these types of carvings into the stone.


Example of ground breaking open "pit"
27.4185415,27.6154785

Mound covered over by rocks with a vase shape protruding, the rocks are stacked, placed or thrown on it.
27.4165730,27.6246067

It is not inconceivable rubbish from nomads can got through the area over centuries and to this day, but there appears to be ancient masonry and other objects simply are not put on a truck or car or backpack to dump.
27.4138837,27.6255369

It would require severe checking of the area by many person whether there is rubbish mixed !

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When using Google Earth or Maps at close or maximum magnification, ALWAYS wait a minute for the image to completely unpack and be redrawn or it will be too hazy!

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ALL BELOW Not with this thread title,
if you are looking for Mediaeval Ajuran hydraulics, I don't know what this area does but looks to be an ancient installation, the resolution is too bad.
0.553322,42.660351
And nearby, doesn't have much water though the image is "good times" , but, as ever, you can still enjoy the beautiful sandfalls running through the jungle as you dehydrate!
0.551458,42.696337
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Somalia dams "possibly ancient"(probably!)
4.519386,45.513346
4.519105,45.512736    (these first two are not dams but elevated and appear to have faint signs of rubble with layout, it's probably the pin area is elevated and shows how deceptive it is to find dams  and canals accurately  without topographical or radar projection rebuild
4.588889,45.550129
4.593596,45.549652
And
4.505295,45.505118
4.506385,45.512478
Plenty more indications in surrounds of these low hills this was a purpose done by modification, just too vast without mediaeval Ajuran or a community! Subtle, except no economics would spend the money there.

The Dendara light ancient Egyptian relief (of it, there are two separate relief stones) was discovered in Upper kingdom temple beside the River (Hathor temple around 300 bc circa).
Both reliefs appeared to mean "irrigation" and the double snake relief version appeared to mean two rivers. (The two relief stones makes three Rivers, there is a third at the bottom of South Somalia), While most historians and studies research kingdoms, that is an unusual event of any stability anywhere, and much has been mentioned to indicate "city states" in empires histories and extremely logical to solve more remote arid areas requirements (and physical evidence seems to be where I think, a breach between low lying farmland and placed up on the next level or a mound hilltop set back away from absolute view (causes invaders only 180 degrees of attack if a sharp rise to higher plateau and tired them if it is the top of a hill, but they all need safe water near NB wild animals can smell water for miles!). The only other "known world" to the Egyptian Pharaoh's was just north of two Somalian main rivers , but there appears to been some real knowledge of them by the ancient Egyptians.
https://www.booksfact.com/images/technology/ancient_technology/light-bulb-ancient-egypt.jpg

The reason I search these is (searching for ancient irrigation in arid zones) because any culture is either within a few Kilometers of consistent accessible water, and there is evidence communities were there in ancient text that were not near any of the major rivers , inclusive South Sudan and South Ethiopia and more South.(or they mix the point of a river and a port on the coast).

Mon 4 Nov, great example of Somalia - columns, giant ornament , giant formed blocks (seem roman or greek)
4.505186,45.512548   Google Earth , use different close zoom maps. - ruin remnants through surrounding area 100m 's (probably well over 200 ton of well formed worked stone objects).
In a context of travel alike the 40,000 mentioned , An archaeologist once told me it is possible to almost go to any place in the past 6000 years from Egyptian records, it is simply locating the record and locating the coordinates correctly, but they traded with places regularly as we talk today far further off the map of places associated with Egypt, Nubia, Kush Punt as them all being as developed as Luxor or Alexandria!

Time to apply the cream. The Dendera light relief show Pharaoh holding out what is believed to be a Lotus stem in a pose alike he's taking a leak, meaning he may died of Kidney trouble, Lotus is both birth and death(rebirth to afterlife) , too Seth seems to be at the end of one of the version relief holding up two knives and probably means he wants "double shares" in the wealth, probably someone elses.
It seems to say three rivers has immense wealth and they cannot get their hands on it, it's troubling them.

For frankincense and myrrh , some irrigation may been needed to raise the sap yield, but at any rate it would be required in a hot dry low rainfall isolated area away from rivers and away from things such as Pharaoh or Seth to simply access.
I don't know what this is, but appears it is a dam 200m x 200m created by sloping to one side of a rise by digging with appears to be a right angle stone wall buried in the east corner,
4?31'05.1"N 45?30'49.1"E
4.518074483690995,45.51363886381292
a little below the coordinate tag.
There are also aka debris of a worked or formed shape nearby.
GOOGLE-EARTH-IMAGE-COLOR-BALANCED - CLOSE
OTHER AERIAL IMAGE - WIDE shows the three sides loaded with artefacts , and a ramp above the numbered pins
3rd image , Another ramp, "long  ramp" and artefacts further to right of area - it was much nicer than thought , when the Portuguese attacked the Ajuran at Mogadishu its easy to see why they failed if this area is Ajuran! They would need to be proper prepared invaders and probably had no knowledge of these small city state areas in arid isolation being so well supplied by internals as producers (bad mistake)!
And if this is an extremely worn giant monument 4.522141903130711,45.51259825347368 with a surrounding , then the Arjun or whoever were extremely healthy and little wonder the Portuguese were flogged the second time round when they were prepared !!
So...Hazard a guess, those are city walls not one bank end or side of a massive dam. However, there is plenty of evidence in the surrounding Kilometers there are totally deliberate dams evident.

A set of three dams beside(in proximately is a better description by stepping) each from the set of nearby ruins.
 4.521133,45.511842
It may been this one I meant (any are difficult and subtle)
4.520497,45.510705

Of ruins, further over the hill from these would be an archeologists delight !!!
A whole mediaeval town in ruins (unmistakable).
To the right of these coordinates at near full zoom.
4.526539,45.511019

The following is only a nice idea and is slowly becoming wrong, only because the center of these circular puddles in steps down the mounds have ruins in them often enough, However, it is peculiarly stupid to build in a giant puddle!! At some point they would be ruins quite soon , so no idea when they were built.
Too, generally for water storage i would say i could have it right , those are quite deep classic dam shape of square or round four side, and usually (oddly - but a secure place) at least one at the top of the hill, others around the hill side.

Thought of why the dams seem to be in hills or hillside and seems each of these circular puddle dams are proximate each other, "the circular ones are irrigation fields for flooding" after some water is soaked in the channel to the next lower one is reopened and drained down onto the next, each puddle soil surface is kept absolutely level surface (probably the main work easier to move soil to maintain an even level field surface) while the water is in the puddle field. That allows mass plant watering with few people!
Never mind your John Deere PTO pump or your stationary diesel pump for "broad acre farming"!
NB one of the first kings of the Persian Empire around 500 600 BC had a giant irrigated garden at his residence.
Harrapan were irrigators in the Indus valley , of that point, the Persian Empire at that time stretched to there, the reliefs of the Harrapan seals appear very Persian like , too the Dendera  relief.
I wonder if there are any Persian archives with their script.

i cannot say the images im using arent as good as it gets (lousy!) , but before we "bed down under the diesel for the night" there is "a funny story about this".
One of the most common symbols etched or found as "massive stone block" is "a carved triangle" and sometimes near it a circle! On the Dendera light relief there are few symbols , but a circle and a triangle that would seem to be hieroglyphs are prominent at the top. It is interesting to note one of the other symbols resembles a bowl with something pouring out both sides. There really are around only four symbols can mean they are some attempt at writing on the Dendera light reliefs!
4.493384263922929,45.51679251848174 remains of massive stone triangle and circle.
To the east of this appears to be a massive dam 70m x 100m!

[nicephotog (OP)]

Being a bit naughty continuing this, but the other images explain something better not part of this post.

i cannot say the images im using arent as good as it gets (lousy!) , but before we "bed down under the diesel for the night" there is "a funny story about this".
One of the most common symbols etched or found as "massive stone block" is "a carved triangle" and sometimes near it a circle! On the Dendera light relief there are few symbols , but a circle and a triangle that would seem to be hieroglyphs are prominent at the top. It is interesting to note one of the other symbols resembles a bowl with something pouring out both sides. There really are around only four symbols can mean they are some attempt at writing on the Dendera light reliefs!
4.493384263922929,45.51679251848174 remains of massive stone triangle and circle.
To the east of this appears to be a massive dam 70m x 100m!  (see the pushed over angle view images)