Have been To Madurai once Marvelous city. Rameshwaram is quite small.. any way now to the point all of the cities mentioned here have some form of connectivity and also have good number of trains. but there are several cities in KA itself which doesn't even have inter KA trains forget about BSB or HWH. BAY/HPT been struggling for years just for a ICE to Bangalore. There's no intra state trains to anywhere except from sbc,Mys . Whole of South and Central KA has to depend on SBC/MYS to go for anywhere and Coastal Ka dependent on MAQ. And there's north Ka which gets neglected on everything. Situation for You there (listed cities) is not bad as bad as in here.
I...
more... Come from a City Which had most number of KA CM and having rail line since 1899 but in name of rail connectivity it's all ends at Sbc or Mys