These stones are drilled through the center and stacked with rebar running through the center. Though this picture is not what I saw at the banks of River Ganga, near Shivpuri (15 km from Rishikesh in Uttarakhand) as our raft turned a bend in the river, the stone pillars built like the ones in this picture were amazing, as they stood out against the mountainside and wild flora, with a temporary camping site by its side at a height of 50 ft from the river level. 

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