The route to Fantasea Valley Resort from Karjat is pretty much straight forward. About 9 kms on the Tata road from Karjat will get you to Kadav a small town on the way to Vaijanath from where one would have to take a right turn to get to Vaijanath which is about 6 kms away from Kadav.
Mumbai to Fantasea Valley Resort - 75 kms
Pune to Fantasea Valley Resort - 115 kms