Ko Lanta Yai offers a variety of activities and attractions that cater to different interests. Exploring the Beaches is a central activity, with Long Beach and Kantiang Bay being popular spots for relaxation and swimming. These beaches provide a serene environment, allowing visitors to unwind and enjoy the natural beauty of the island.

Diving and Snorkeling are highly recommended for those interested in marine life. The waters around Ko Lanta are home to vibrant coral reefs and diverse aquatic species. Several dive shops offer trips to nearby sites, including the famous Koh Haa and Hin Daeng.

For those who enjoy nature, visiting Mu Ko Lanta National Park is worth considering. The park features lush jungles, hiking trails, and opportunities to spot wildlife. The lighthouse at the southern tip of the island offers a picturesque view and a chance to learn about the area's maritime history.

Local Culture can be experienced by exploring the Old Town of Ko Lanta. This area showcases traditional wooden houses, local shops, and cafes. Walking through the streets allows visitors to appreciate the island's history and the influence of its fishing community.

Cooking Classes are also popular for those wanting to immerse themselves in Thai cuisine. Many local establishments offer classes where participants can learn to prepare traditional dishes using fresh ingredients.

Island Hopping provides a chance to explore nearby islands, such as Koh Rok and Koh Phi Phi. These excursions often include activities like swimming, snorkeling, and enjoying a picnic on the beach.

Lastly, sunset views are a must-see while on the island. Many beachfront bars and restaurants offer unobstructed views of the horizon, creating a perfect setting to relax and reflect on the day's experiences.