Question

which four towns are known as chardham? what is the belief linked to them?

Answer 1

However one thing is also to be noted here that according to some traditions the Char Dham are Badrinath, Rangnath-Swami, Dwarka and Jagannath-Puri all the four of which are Vaishnav sites and their associated places are Kedarnath, Rameswaram, Somnath and Lingaraja Temple, Bhubaneswar (or maybe Gupteshwar) respectively ...

Answer 2

badrinath, dwarka, puri and rameswaram are known as char dham.

the belief is that:

IF WE UNDERTAKE A JOURNEY TO THESE PLACES, THEN ALL OUR SINS WHICH WE HAVE DONE IN OUR PAST LIFE WILL BE ERASED AND DOORS WILL BE OPENED FOR THAT PERSON TO GET SALVATION.