This story was supposed to be shown but sad DKDM always ignores stories of south INDIA😭😭
It goes like this (typed by me. not copy pasted from Wikipedia😆)
We have already seen that Mahadev agrees to become a linga and Ravan has to take him to lanka in linga form only. But mahadev puts a condition that ravan shouldnt put the ling on the ground. If he puts the ling down then the ling will remain fixed at that position only and ravan wont be able to lift it.😆
Now when Ravan reaches gokarna, Our ganesh decides to fool him as gannu wants mahadev back at kailash as parvati mata is missing mahadev.
So at Gokarna Ganesh blocks ravan's way and tells him to have some rest (actually my granny told me that he asks ravan to go for toilet😆 Dont know wat DKDM is going to show😆)
And Ganesh tells Ravan that he'll hold the link while ravan is away. And our clever ganesh puts the ling down.
Lo Behold!!! Once Ravan is back, he is shell shocked and is unable to life the ling back and the ling remains fixed there. he's mad at ganesh and hits ganesh on his head with his fist.
A hole is created on ganesh's head.
The linga and ganesha(with a hole on his head) can be found at gokarna.
Its a beautiful place. MUST VISIT!!!😆
Notice the head on Ganapati's head.

This place is in karnataka(where i currently reside😆)