The labyrinth is some 4.4 km long, so in reality it would take some 50 minutes to walk it (so some 10 times longer than in this simulation).
I don't think drug induced stimuli would have been used; otherwise how to stick to the 1.1 m width?
Another option: I do think the path is wide enough to stay alive: if there would be a penalty of death when transgressing the path border.
The spiral walking can make someone somewhat dizzy, but perhaps more at night than during the day...
Or it might have been a symbolic labyrinth.
Based on idea of C. Ruggles and N.L. Saunders expressed in the article "Desert labyrinth: lines, landscape and meaning at Nazca, Peru", Antiquity 86 (2012), pp 1126-1140: http://antiquity.ac.uk/ant/... and http://www2.cliveruggles.co... . And I am using 'in fair scientific use' the drawing of the labyrinth's path (Figure 2, made by Deborah Miles-Williams). It is slightly adjusted: height lines removed; 'dots' are joined; and path is made light brown instead of black.
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