The topic of star forts is very very interesting, though it raises more questions than satisfying answers.

For example, central Asia has many such forts in the middle of nowhere ([1] [2] [3] [4] [5]), some barely noticeable except from above, and even the surrounding landscape looks so scorched one wonders what really happened for the land to look like this and for these forts to be so erased. If you think natural erosion you imagine millennia, but focus on the forts and you imagine centuries, and it's hard to combine both scales.

Also you can find star forts all over the globe.The kmz file from this site [6] lists about a thousand locations across the globe, it's mind boggling to navigate around them. Who or what civilization managed to propagate this style so far beyond the reaches of what history taught us?

Finally the star forts are most often associated to the finest water canal in the world, and it's also mind boggling to imagine the amount of work involved in modelling the earth at such scale and precision without any engine.

Wild theories abound, I personally prefer focusing on the things one can see or visit and abstain from believing any (hi)story, but even then it's captivating.

[1] https://goo.gl/maps/ZUsQsocutLTXiodm7 [2] https://goo.gl/maps/pkTMLFN7fxYofhkw8 [3] https://goo.gl/maps/SwogTFKo1uuidPNn9 [4] https://goo.gl/maps/1aFRdVHujvL8jLNTA [5] https://goo.gl/maps/gXTCPXjkSvbFnT2B9 [6] http://starforts.org/locations.html