Koh Tan and Koh Mudsum are two small islands located near the island of Koh Samui, in the Gulf of Thailand. They are situated off the east coast of Koh Samui and can be reached by boat from the mainland or from Koh Samui. Koh Tan is known for its clear waters and beautiful coral reefs, making it a popular spot for snorkeling and diving. Koh Mudsum is a small, uninhabited island that is also popular for its snorkeling and diving opportunities. Both islands offer a peaceful and secluded getaway from the more developed and touristy areas of Koh Samui. Visitors can take a day trip from Koh Samui to visit the islands and enjoy the beautiful natural scenery and marine life.

- Explore the island: Koh Tan and Koh Mudsum are small islands located off the coast of Koh Samui. Visitors can explore the island and take in the beautiful beaches and landscapes.
- Snorkel and dive: The islands offer excellent snorkeling and diving opportunities, visitors can see a variety of marine life including coral and tropical fish.
- Take a boat tour: Visitors can take a boat tour of the surrounding seas and islands and see the beautiful beaches and coastline.
- Beach activities: Visitors can enjoy a variety of beach activities such as swimming, sunbathing, and beach volleyball.
- Take a class in traditional Thai arts: The islands offer classes in traditional Thai arts such as traditional Thai dance, traditional Thai cooking and traditional Thai massage.
- Visit the nearby temples: The islands are home to several Buddhist temples, visitors can visit the temples and see the beautiful statues and artwork.
- Attend a traditional ceremony: The islands host traditional Thai ceremonies such as merit-making ceremonies, visitors can observe and participate in these events and learn about Thai culture and Buddhism.
- Visit the local market: The islands have a local market that sells a variety of goods such as fresh seafood, fruits, and souvenirs. Visitors can take a stroll through the market and browse the different stalls.
- Take a sunset walk: The islands are known for their beautiful sunsets, visitors can take a walk along the beach and watch the sunset over the sea.
- Take a traditional Thai blessing ceremony: Visitors can take part in a traditional Thai blessing ceremony where a monk will bless them with good luck and fortune.
- Regulations: Visitors are expected to be respectful of the local community and culture, and should dress modestly. Also, visitors should be aware that some of the local shops and restaurants may have specific dress codes.
- How to go there: Koh Tan and Koh Mudsum are small islands located off the coast of Koh Samui, Visitors can reach the islands by taking a boat tour or renting a longtail boat from the main town of Nathon.
- Cost: There is no entrance fee to visit the islands, but visitors may have to pay for boat tours, traditional Thai massage sessions, or other activities.
- Opening date and time: The islands are open to visitors every day, but the opening and closing time of the shops and restaurants may vary. Some shops and restaurants may be closed on certain days. The best time to visit the island is during the dry season, from November to April, when the sea is calm and the weather is pleasant.