Acoustic Phenomenon in Serra do Roncador: the rumble of the sacred stones
In Serra do Roncador, in Mato Grosso, the wind that passes through the rock formations produces steady low sounds, resembling a rumble. The Xavante people consider the place sacred, associating it with a passage between worlds. Visitors mention feelings of disorientation in the caves; however, the acoustic phenomenon, though recognized, still lacks systematic measurements.






