The authors did not indicate the location of this abandoned mine<\/strong>, nor even the country in which it is located, although judging by what we see in the video and from what I have been able to find out, it is in the state of Kentucky, in the United States.<\/p>\nThe most striking thing about this enormous mine is that there is a large lake of greenish water inside.<\/strong> That color is not usually a good sign, but despite this, one of the protagonists of the video took a dip in that lake<\/strong>, something that some viewers have criticized in the comments of the video, pointing out that in cases like this it is better to take a test to measure the acidity or alkalinity of the water<\/strong>, in order to avoid unpleasant surprises due to the possible presence of fungi or toxic chemicals:<\/p>\n