10 amazing optical illusion tattoos you have to see to believe

An impressive tattoo posted over the weekend by Paul O'Rourke of Allstar Ink in Limerick, Ireland, really left us scratching our heads.

Clearly, some tattoo artists are ahead of others when it comes to decorating skin and creating tats that not only catch they eye but stretch the imagination.

This one clearly looks like there's a hole running through the wearer's bicep. And it spurred us to look around for some of the best optical-illusion tattoos on the Internet.

If there's anything to learn from these, it's that there is no limit to creativity!