This hole resembling like the mouth of hell may look dangerous at first glance, but everything is so perfect about it. Still, you may wonder about the waters disappearing into the hole. Calm down! No ghost family is residing over there.
While the reason for the mysterious double waterfalls in Minnesota is shocking, this famous hole has also surprised the people all over the world. This beautiful place discovered recently is the dam of the Conchos situated in the Serra da Estrela, Portugal. The mysterious hole is actually a part of the hydroelectric system.
Source via YouTube
So what are you waiting for? Pack your bags and plan a trip to this lovely place.