Observation tower?
A Great Wall of China tower?
A Ziggurat?
A minaret?
very close
A tomb?
A lookout fire tower?
so far, all nos till this guess
A tower used for sacrifices?
Gonbad-e Qabus?
A dakhma (tower of silence)?
I was going to say that…
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The Tower of Elahbel?
noes
It is not a religious structure, nor an ancient ones
and, it is not a tower, though fire tower is a good guess.
Cell phone tower?
A bone house?
Tomb tower in Jebel Qurma?
A crematorium?
A columbarium?