Baba baidyanath dham is one of the twelve jyotirlinga of lord shiva. This holy palace is situated in deoghar of jharkhand state. According to shivpuranam, once the monster king ravan was so excited to live with lord shiva in lanka. He was the great follower of lord shiva.
Once he goes to kailash parvat and says to lord shiva to go with him for lanka. Lord shiva give him the jyotirling and says to go with the jhotirlinga & warned him that the jyotirlinga should not be touch on land, otherwise I will fix alive permanently on that place.
Ravan was so rude, he says hmmm and goes to lanka with jyotirlinga. But he felt urine hardly. He give the jyotirlinga to a farmer and go to urine release. But actually the farmer was lord vishnu and he put the jyotirlinga on land on that place.
This holy palace is Devghar and it is really a unique temple. Here goddess parvati is also live with lord shiva. It is the best place for the followers of lord shiva.