The experience was good. Coming from Islamabad took the Lillah interchange to visit Khewra. It is approximate 30 minutes drive from there. The road is in ok condition. It is a single road. You take left from Pind Dadan Khan and reach khewra.
The tour train which takes you inside the cave malfunctioned (it derailed) so I decided to walk. It is not a long walk and you can visit the cave and return to the exit in around 4 KM. I carried my own water bottle but you will find snacks and food inside the cave as well. I am posting more pics of the cave. It is a nice place to visit atleast once.