9. Fly Geyser, United States

Fly Geyser, located in the Nevada Desert, is a collection of three large, colorful mounds which continually shoot five feet of water straight up into the air. It was accidentally created in 1916, during a routine well-drilling. It worked normally until the 1960s, when heated geothermal water started spurting out through the well. Dissolved minerals began to accumulate and gradually built up into the large, colored mounds we see today. Fly Geyser is amongst the most secret places on Earth, as it’s located on private property and no tourists or sightseers are allowed in.