Majestic mountains and sparkling seas always attract travellers – but
sometimes nature has a bigger trick up her sleeve. To track down some of the
world’s strangest sights, we turned to question-and-answer site Quora,
asking: What are some of the best rare natural phenomena that
occur on Earth?
From Australia’s bubblegum-pink lake and a blood-red
waterfall in Antarctica to a secret beach-in-a-hole in Mexico and a US valley
where stones eerily move, these seven spots are Mother Nature’s eyeball-popping
sideshow.
Found in winter in high northern latitude lakes like Lake Abraham in
Alberta, Canada, these gas bubbles are created when dead leaves, grass and
animals fall into the water, sink and are eaten by bacteria that excrete
methane. The gas is released as bubbles that transform into tens of thousands
of icy white disks when they come into contact with frozen water, Quora user Mayur Kanaiya explains.
It’s a stunning, but potentially dangerous sight. This
potent greenhouse gas not only warms the planet, but also is highly flammable.
Come spring, when the ice melts, the methane bubbles pop and fizz in a
spectacular release – but if anyone happens to light a match nearby, the masses
of methane will ignite into a giant explosion.
Curious travellers can see these gassy hiccups in lakes
across Canada’s Banff National Park, or in the Arctic Ocean off Siberia, where
researchers have found gargantuan gas bubbles as large as 900m across.
Blood Falls, Antarctica
The name says it all. Blood Falls, in East Antarctica’s
McMurdo Dry Valleys, looks like slowly pouring scarlet-red blood, staining
snowy white Taylor Glacier and Lake Bonney below. It’s a surprising – and
creepy – sight to behold.
The trickling crimson liquid isn’t blood, however. Nor is
it water dyed by red algae, as early Antarctica pioneers first speculated. In
fact, the brilliant ochre tint comes from an extremely salty sub-glacial lake,
explains Quora user Aditya Bhardwaj.
About two million years ago, a hyper-saline body of water became trapped
beneath Taylor Glacier, isolated from light, oxygen and heat. As the saltwater
trickles through a fissure in the glacier, it reacts with the oxygen in the air
to create this spectacular, rust-hued cascade.
It’s a visual and scientific wonder, and Taylor Glacier –
accessible only by helicopter from McMurdo Station or Scott Base, or cruise
ship in the Ross Sea – is the only spot on Earth to see it.
Sailing Stones, US
When visitors stumbled upon scores of heavy stones that
appeared to have moved across the dried lake bed of Racetrack Playa in
California’s Death
Valley National Park, leaving a tell-tale trail in their wake,
scientists were baffled. How had so many boulders, some weighing 300kg, moved
as much as 250m across this remote part of the valley, asks Quora user Farhana Khanum?
Adding to the mystery, some trails were gracefully
curved, while others were straight with sudden shifts to the left or right.
Who, or what, had moved the stones? A slew of theories emerged, from magnetic
fields to alien intervention to dust devils to pranksters.
It took a NASA scientist to crack the case. In 2006, Ralph Lorenz
developed a kitchen table model using a small rock frozen in an inch of water
in a Tupperware container to demonstrate ice shove, the phenomenon behind the
mysterious sailing stones.
In winter, Racetrack Playa fills with water and the
lakebed’s stones become encased in ice. Thanks to ice’s buoyancy, even a light
breeze can send those frozen boulders sailing across the muddy bottom of the
lakebed. Stones with rough bottoms leave straight tracks, while those with
smooth bottoms drift and digress. Warmer months melt the ice and evaporate the
water, leaving only the stones and their mysterious trails.
Visitors can see these sailing stones in a few locations,
including Little Bonne Claire Playa in Nevada and most famously, Death Valley’s
Racetrack Playa.
Kawah Ijen Lake, Indonesia
Travellers flock to the Indonesian island of Java to see
the magnificent Kawah Ijen volcano – but what they don’t expect to find is the
stunning turquoise-hued caldera lake at the volcano’s summit. To add to the
drama, bright, citrine-coloured stones and billows of white gasses surround the
1km-wide aquamarine lake in a spectacular show.
One element is responsible for the entire, striking scene: sulphur. The
magma chamber below the volcano pours sulphuric gases into the lake. Combined
with a high concentration of dissolved metals, the gases turn the water a
brilliant shade of blue. They also render the Ijen crater-lake the world’s
largest highly acidic lake with a pH of 0.5.
That same chamber blasts a continuous stream of sulphuric
gas from lakeside fumaroles that swirl around the lake. When the gas condenses
and falls to the ground, it dyes the lake’s surrounding stones a shocking shade
of electric yellow.
“Hydrogen chloride released from Ijen volcano mixed with
the lake and turned it into an acidic monstrosity that it is today,” writes
Quora user Vinay Sisodia. “What makes this place even
more stunning, especially at night, is shots of sulphuric gases that combust
into glints of bright blue upon contact with air.”
Intrepid travellers can join three-hour hikes to the bank
of the crater to experience the lake in person.
Hidden Beach, Mexico
It’s a vacationer’s dream: a secret beach tucked away
from the masses, with shade, sun and pristine water. And this dream comes true
at Playa Del Amor, more commonly known as Hidden Beach, on one of the Marieta
Islands off the coast of Mexico.
The unlikely source of this magical little secret: a bomb
blast, according to Quora user Siddhartha Das. Mexico began testing bombs
in the uninhabited Marieta Islands in the early 1900s, resulting in a gaping
hole in the surface of one of the islands. Over time, tides filled the hole
with sand and water, creating a secluded watery Eden where determined beach
bums can swim, sunbathe and kayak largely out of sight.
Playa Del Amor, literally Lover’s Beach, is invisible from the outside,
but visitors can access it through a 24m-long tunnel that links the secluded
beach to the ocean.
Pink Lake Hillier, Australia
Fly over Western Australia for a rare visual treat:
nestled among dense emerald-green woodlands surrounded by the deep blue of the
Southern Ocean are a series of lakes in a shocking shade of bubblegum pink.
One of the most well known is Lake Hillier, a 600m-long
lake on the edge of Middle Island in the Recherche Archipelago off Western
Australia’s south coast. Surrounded by a thin ring of sand and an expansive
forest of paperbark and eucalyptus trees, the rosy pink lake punctuates a
stunning landscape.
But even more surprising than its Pepto-Bismol shade is that “nobody
seems to be able to definitively explain its distinctive colour,” according to
Quora user Garrick Saito. Possible causes include the
presence of green algae that can accumulate high levels of beta-carotene, a
red-orange pigment; haloarchaea, a type of microorganism that appears reddish
in large blooms; or a high concentration of pink brine prawn.
Most tourists admire the chromatic splendour of Lake
Hillier from a helicopter or plane ride. For on-the-ground visitors, there’s an
added treat: Lake Hillier is highly saline but the water isn't toxic, so pack
your swimsuit and go for a swim. Thanks to its high salinity, you’ll bob like a
cork.
Fairy Circles, Namibia
Across the arid grasslands of the Namib Desert lies an
eerie sight: millions of circular patches of land void of plants, each between
2m and 15m in diameter, arranged in a honeycomb-like pattern across 2,500km of
land. These disks of bare soil, known as fairy circles, pockmark the landscape
in Namibia, as if giant moths ate through the vast carpets of grassland.
Adding to the mystery, no one knows for certain what causes these
otherworldly formations, writes Quora user Prem Rathaur. But there’s no shortage of
theories.
Scientists have suggested radioactive soil, or that
toxins released from plants kills the vegetation in circular patterns. Others
believe the circles are the work of sand termites. To store water, they burrow
in the soil in ring-like patterns and consume the roots of vegetation to allow
underlying grains of sand to absorb falling rain.
Another hypothesis ascribes the circles to competition
for resources. In harsh landscapes, plants compete for water and nutrients. As
weaker plants die and stronger ones grow, vegetation “self-organizes” into
unusual patterns.
Considering the eerie beauty of these phenomena, perhaps
the most fitting theory is that of local bushmen, who say fairy circles are
nothing less than the footprints of gods.
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