Koh Phangan is famous for its beaches, especially Haad Rin beach where the Full Moon party is held. People were so impressed with the beauty of this beach that it became a spiritual gathering place to admire the full moon which then turned into the massive celebration it is today.
You really are spoiled for choice on this island for beaches and each one is unique and different in its own way.
Some have wonderful pebble formations, some are good for snorkelling, some are quiet and others are busy but one thing is that you will find the perfect one for you!