Here are some mysterious places that you never knew even existed.

Sounding as incredible as it may, we would like to remind one about a certain Bermuda Triangle. Aha, now you see. And that triangle is not the only mysterious and scientifically unexplained phenomenon. Here are some others.

Devil’s Kettle, USA

The waterfall is stemming from the Brule River forks into two at Judge C.R. Magney State Park, located on the north shore of Lake Superior, Minnesota. While one half continues on, the other half disappears ten feet into the underground down a pothole. This initial channel is known as Devil's kettle.

Researchers have tried to trace it but to no avail. Ultimately, it has been declared unsafe for people to explore.

Hessdalen Lights, Norway

Floating specks of white, yellow and red are seen to whiz across the Hessdalen valley, in central rural Norway, when it is dark. Lasting between few seconds and about an hour, these lights known as Hessdalen Lights sometimes move at high speeds and sometimes it is very slow as if hanging on for a bit.

Occurring at least since the 1930s, locals and researchers alike have tried to put forth various theories, but not of it have concretely checked out.

Boiling River, Dominica

Shanay-Timpishka, a four-mile-long river, deep inside the Amazon can register a temperature of as high as 91.1° C (196 F). But the unusual thing is that it has no contact with any active volcano, the closest one is about 700 km away. Any living creature which falls into the river boils to death. Though many scientists surmise that there might be an underground fault line that causes the phenomena, nothing have been proved yet.

The Petrifying Well, England

Anything the water of the cave, on the banks of the Nidd River, in North Yorkshire, which vaguely resembles a skull, touches, it immediately turns to stone. No wonder it was once thought to be cursed. The reason has been unearthed — it's the unusually high mineral content of the water. But what's still baffling is the rate of this petrification. Normally, similar structures like stalactites and stalagmites take centuries to form, but here how the solidification can be effected only between a few weeks to months, depending on the size, is an ongoing mystery.

Double Tree, Italy

Straddling between two towns — Grana and Cosorzo in Piemonte is a tree within a tree. There's a mulberry tree within a cherry tree, perfectly growing together in sync. Modern understandings of grafting or parasitic growth due to bird droppings hello have failed to explain this unique phenomenon.