How incredible is this! A geologist from Brazil has found a rare volcanic rock that has an incredible feature on the inside.
From the outside it looks like any old rock, but inside bares a stunning resemblence to Sesame Street's Cookie Monster!
"I didn't realize that Cookie Monster was so well known and part of the world cultural heritage!" the man who found the rock said.
The actor behind Cookie Monster has even reached out to him, so who knows - the rocks might make their way on to TV sometime soon!
Check out a video of the rocks below...