The Cango Cave tour guide and local resident, Coetzee, went on to demonstrate the great acoustics in the Cango Caves cavern with a stunning performance of an operatic classic, Ave Marie.

The video titled, “POV: Your tour guide at the Cango Caves offers to test the acoustics for you”, was posted by travel blogger Sharon Waugh.

Allegations of negligence on the part of guides conducting tours around the Cango Caves are to be investigated after an obese woman got stuck in the caves last week, trapping 23 others.