There are are some happenings which are beyond our control, and somehow are difficult to explain. Some of them are the different phenomena of the world. Perhaps, you already noticed some of them, but you are only unaware of what they are. I will introduce you some...
Sinkholes are one of the world's scariest natural phenomena. Over time, water erodes the soil under the planet's surface until in some cases, quite suddenly, the land above gives way and collapses into the earth. Many sinkholes occur naturally while others are the result of human intervention. Displacing groundwater can open cavities while broken pipes can erode otherwise stable subterranean sediments. Urban sinkholes, up to hundreds of feet deep have formed and consumed parts of city blocks, sidewalks and even entire buildings.
While many see these apparently perfect ice circles as worthy of conspiracy theorizing, scientists generally accept that they are formed by eddies in the water that spin a sizable piece of ice in a circular motion. As a result of this rotation, other pieces of ice and flotsam wear relatively evenly at the edges of the ice until it slowly forms into an essentially ideal circle. Ice circles have been seen with diameters of over 500 feet and can also at times be found in clusters and groups of different sizes as shown above.
They are not only weird and strange but they are also scary...