Krabi town  is very close to the river mouth that opens to the great Andaman Sea. Krabi river flows about 5 km through the town and opens into the Andaman  sea at Tambon Pak Nam. Quite a few other rivulets originating from the mountain ranges in the province , Kao Panom Benja ; the Klong Pakasai, Klong Krabi Yai and Klong Krabi Noy, also joins the sea at this area.

Krabi offers spectacular scenery above the surface, and below it you'll find an abundance of marine life awaits. Krabi also serves as a good base to explore the smaller offshore islands or go further afield to Koh Phi Phi. Most of the local dive operators are located at Ao Nang, a coastal resort around 30 minutes drive from the town.