14-year-old Yana Tamocheva went missing while picking berries in Siberia's remote Krasnoyarsk region.
Footage allegedly recorded at the time of the sighting has since managed to make its way on to YouTube.
Referred to by some as 'Doorway to the Underworld', Siberia's Batagaika Crater is constantly expanding.
The bizarre spectacle occurred after a pipe burst and water from a drainage well rose to the surface.
An unusual natural phenomenon in Siberia has covered an 11-mile stretch of beach with huge snowballs.
Andrey Solovyev has braved freezing temperatures in his quest to locate Siberia's own Loch Ness Monster.
A 50,000-year-old sewing needle made from bone has been discovered during a dig at a cave in Siberia.
A witness has captured footage of what is thought to be a rare case of ball lightning on his smartphone.
The unseasonably warmer weather appears to be having an adverse effect on the Siberian permafrost.
Did an asteroid strike the remote Siberian wilderness over a century ago or did something else happen ?
New details have emerged about the mysterious crater which opened up in a remote part of Siberia in 2013.
The rare natural phenomenon was captured on camera in Omsk Oblast - a region in southwestern Siberia.
A large horned beast known as the 'Siberian unicorn' could be the origin of the modern unicorn legend.
Residents in Barnaul have become so fed up with politicians that they've resorted to voting for a cat.
A 3.5 million-year-old bacteria found in Siberia could make it possible for humans to live longer.
A giant virus discovered frozen beneath the tundra has been revived after more than 30,000 years.
Scientists in Siberia have set up a lab dedicated to the goal of cloning a mammoth from ancient DNA.
The world's most endangered species of cat has seen a significant population increase in recent years.
A small island on a remote Siberian lake is home to stone ruins that remain shrouded in mystery.
Lake Baikal in Siberia has been home to a spate of peculiar sightings and strange tales in recent years.