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[2025 Koh Samui Attraction] Travel Guide for Koh Mat Sum (Updated Mar)

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Mason Island is a less developed original private island near Koh Samui. It has soft white sand and clear water, where you can snorkel, swim and enjoy leisure time on the beach.
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Koh Mat Sum Address:

Taling Ngam, Ko Samui District, Surat Thani, Thailand

Koh Mat Sum Recommended sightseeing time:

1-2 days
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