Head out very early in the morning for Baratang island.
This island between South and Middle Andaman has beautiful beaches, mangrove creeks, mud-volcanoes and limestone caves. Andaman Trunk Road to Rangat and Mayabunder goes through this island. Limestone cave can be explored with the permission of Forest Department at Baratang and proper local guidance.
Baratang is 100 kms away from Port Blair. One has to travel by road and cross a creek on a vehicle ferry at Middle Strait to reach Baratang. Government, private buses and other transport are available.
If you are lucky, you can spot few Jarawas on your way to the island but don't click photos or make faces as it is against government rules.