Prepare to be amazed by these incredible natural phenomena

Natron Lake, Tanzania - This is a salt lake that is less than three meters deep. The water has an elevated pH, and as it evaporates during the dry season the level of salinity increases, encouraging the proliferation of certain microorganisms, such as cyanobacteria. This is what gives the lake its red color.

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Crab invasion - Every year, around 120 million crabs pass through Christmas Island, in Australia, on their way to the Indian Ocean to reproduce. During this period, the authorities close the local roads.

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Desert in bloom - The plains of the Atacama desert are famous for this phenomenon, which happens in years of increased precipitation.

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Flammable bubbles trapped in ice - These frozen methane bubbles are trapped beneath the surface of Abraham Lake, Canada.

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Rainbow mountains - The mountains in Zhangye Danxia National Geopark were formed by trapped layers of mineral deposits, which were then subject to immense pressure by the movement of tectonic plates over thousands of years.

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Pamukkale - In Turkey a series of thermal pools with high levels of calcium has formed gigantic basins over the centuries. In 1998 it was made a world heritage site.

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Glowing sea - Various species of phytoplankton are known for their bioluminescence. They are microscopic marine creatures which generate light as a defense mechanism. This light emanates from the waves that are closest to the shore.

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Giant's Causeway - Located in Northern Ireland, this section of the coast contains around 40,000 mostly hexagonal columns of basalt, the product of a volcanic eruption from millions of years ago.

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Stratospheric polar clouds - These clouds are formed in the stratosphere, at an altitudes of 15,000 to 25,000 m. They usually form close to the polar regions.

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Spotted Lake, Canada - This is an alkaline endorheic saline lake which contains some of the highest levels of magnesium sulfate and sodium sulfate in the world.

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Rainbow eucalyptus - The outer bark of these trees grows at different periods throughout the year, creating a multicolor effect.

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Fairy circles - These circles can measure are 2 to 25 m wide, and are in the desert of Namibia. One theory is that they are created by the colonies of termites living underground, which provide sustenance to the roots of the plants.

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Mammatus cloud - These clouds have an interesting pattern of pockets, which where they get the name "mammary" clouds.

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Migration of sardines - Between May and July each year, millions of sardines travel from the north to the south African coast.

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Catatumbo lightning strike - This atmospheric phenomenon takes place on the river Catatumbo in Venezuela, 140 to 160 nights a year, for 10 hours a night, and 280 times an hour.

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Great Blue Hole - Located in Belize, this hole is 300 m wide and 124 m deep. It's actually a cave that formed thousands of years ago.

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Fire rainbow - This visual phenomenon happens when a halo is formed by the refraction of light from the sun or the moon through crystals of ice suspended in the atmosphere.

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Sliding rocks in Death Valley National Park - A weird geological phenomenon where rocks move across the ground without any human or animal intervention. This happens when vast sheets of ice are formed and then melt, moving the stones in the process.

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Moeraki boulders - On the beach of Moeraki, in New Zealand, these boulders are made out of mud, sludge, and clay. Over millions of years they have undergone a process of erosion, with the waves molding the stones through sedimentary processes.

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Darvaz crater - Also known as the Door to Hell, it is actually a field of natural gas. It is in Turkmenistan and has been on fire since 1971.

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Asperitas - A sinister-looking cloud, this was suggested as a new type of cloud by Gavin Pretor-Pinney in 2009. Though they look dark and tumultuous, these clouds usually dissipate before storms happen.

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Frost flowers - These ice crystals can be found on lakes covered in thin ice.

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Starlings united - Thousands of starlings gather in parts of the United Kingdom during wintertime, just before sunset.

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Plumes of cloud - These can be found on Mount Erebus, the southernmost active volcano on the planet.

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