The Most Mysterious, Deepest, And Unexplained Holes Found On Planet Earth

For one reason or another, people tend to have a fascination with giant holes. Whether they are human-made or have mysterious origins, it’s quite okay to have such a keen interest in gigantic holes. There’s no telling what could be going on at the bottom, what type of creatures lurk in their shadows and how some of them even came about in the first place. With great pleasure, we bring you the deepest, scariest, and most intriguing openings this world has.

Glory Hole, Monticello Dam, California

You can find Monticello Dam in Napa County, California. Construction started in 1953 and ended in 1957. This is a human-made hole and it’s used when the reservoir reaches full capacity. The reservoir provides water to San Francisco’s North Bay area.

The hole itself can take in 48,000 cubic feet of water per second! That doesn’t sound like anything anybody should be swimming in. A woman drowned after she was sucked into the spillway back in 1997 and they banned swimming in it ever since.