What phenomenon on earth makes you feel that it is not something ordinary people can see?

The underwater waterfall is located not far from the island of Mauritius in the Indian Ocean. It is hidden deep below the sea level and is almost invisible to the naked eye. Its huge drop can reach 3,500 meters, which is four times higher than the world's largest waterfall, Angel Falls. It is a true underwater wonder. Here, 5 billion liters of seawater pour down from the cliffs every second, which is equivalent to pouring 25 Amazon rivers into the ocean in one second, forming a waterfall about 200 meters wide. Scientists once sank into the water here. Apparently, the current meter was destroyed by the huge amount of water, but it was precisely because of this that people discovered the existence of this underwater waterfall.