An optical illusion featuring shells has left many people scratching their heads - until they realise what's hidden in the ...

The startling image appears to depict an array of multicoloured shells arranged in a pattern - but there's more to ...

Optical illusions can appear different to different people, and one in particular has garnered a lot of attention on social ...

The bizarre optical illusion has left thousands of people completely captivated whereas others were mildly terrified - and ...