The Double Tree
In Piedmont, Italy, you can find a cherry tree which looks completely ordinary, except for the fact that it has grown on top of another tree. The phenomenon is not as uncommon as it may seem at first glance, as various other parasitic trees have been documented in the past. However, those trees were small and stunted while the "double tree" of Casorzo is made of two completely healthy trees. The cherry tree and the mulberry tree extend their branches up to 16 feet (5 meters). The existence of the "double tree" has not been explained yet, but it is believed that a cherry pit might have been dropped on the mulberry tree by a bird, which then somehow reached the ground and sprouted in it.
Never-ending Catalumbo Lightning
Above the Catalumbo River, Venezuela, eternal lightning followed by thunder storms above the water can be seen almost every night. The phenomenon starts from 7 PM, lasts for 10 hours, and happens 260 days per year. The cause has not been discovered yet, but experts believe that the shape of the nearby mountains results in a collision between hot air and cold winds, which causes a fast evaporation of water and methane from a local oil field. One day in 2010, the thunder suddenly stopped, but the storm started raging again six weeks later.
Biei: Blue Pond That Changes Color
On Japan’s Hokkaido island, there is a unique lake – its blue color changes hues when observed from various angles. The color changes even more during the seasons, ranging from various shades of blue toward grey. The lake is artificial, and it was made so that it could collect water from a nearby dam. To the surprise of the locals, the water started changing its color, and scientists say that an abundance of aluminum-oxide particles which reflect light is the reason why the color changes.
In mountainous regions of Pennsylvania, USA, you can find fields of bizarre rocks, the origin of which remains mysterious. Another mystery is the ringing sound they create when hit, completely different from the sound one expects to get when hitting a rock. There are various explanations for this phenomenon. An expert claims that when one rock is hit, it emits a low-frequency sound which human ears can’t detect, but when the rocks are joined and struck together, the sounds get mixed, and their interaction leads us to perceive it as a ringing noise.
Kawah Ijen: Glowing Blue Lava
Miners who work the night shift in a sulfur mine in Indonesia don't need to use artificial lighting, as the mine is illuminated by a weird blue light coming from a flowing substance that looks like lava. Kawah Ijen is usually referred to as a blue lava volcano, although there is no lava in it, only sulfur. When sulfuric gases get heated in the volcano, blue flames burst out of it, then turn into liquid sulfur that flows down the mountain and resembles neon-blue lava.