This location is VERY interesting. The amount of work the miners put into this thing, and then to see it full of water, is just mind boggling. There were, however, several down sides: The water is flat cold. You do get used to it after a while but it certainly saps your energy and the overall enjoyment. This is also not the safest dive I have been on. This IS NOT for the beginner diver and there seemed to be a push by staff to get divers into the water. Buoyancy control is somewhat of a challenge under the circumstances and I saw several divers go waaay too deep. The staff divers were good about going down to bring them back up but this just led to confusion and ultimately an unsafe situation. To top it all off, I understand one of their staff divers died while diving alone very deep several years ago. A big no no at any competency level. This is not to say their staff is bad: Some seemed very professional and others did not - I guess that is true where ever you go. So, overall I would say that if you are an advanced diver and you have a thick wallet, may be worth it to go there to at least see it.