Koh Kam Nui is one of the small islands in the “Mu Ko Kam” group, located within Laem Son National Park, a highly fertile marine conservation area in the upper Andaman Sea. The island features a mix of rocky terrain and sandy beach, with a small curved shoreline formed by the accumulation of fine white sand from shells and coral fragments.

The surrounding geography consists of gradually sloping shallow waters, allowing sunlight to reach the seabed clearly. This makes it possible to observe shallow coral reefs directly from the surface without the need for deep diving. The reefs here include hard corals such as staghorn coral, brain coral, and massive corals, along with sea fans and various small marine species like damselfish, butterflyfish, and parrotfish.

Another key highlight is its high level of tranquility. The island has no accommodations, restaurants, or permanent structures, meaning there is no disturbance from commercial activity. Most visitors come on a one-day trip, so during off-peak times, the island feels like a private escape.

Inside the island, clusters of pine trees and coastal vegetation provide natural shade and help prevent coastal erosion. These shaded areas are ideal for relaxing, picnicking, or escaping the sun, while offering panoramic views of nearby islands such as Koh Kam Yai and Koh Kam Tok.

From a tourism perspective, Koh Kam Nui serves as both a stopover point and a high-quality snorkeling spot within the Mu Ko Kam route. It is easily accessible, requires a relatively short boat ride from the mainland, and often has calmer waters compared to some nearby islands—making it suitable for beginners and those seeking a relaxed snorkeling experience.

As the island is part of a protected area, visitors are expected to follow conservation rules strictly, such as not stepping on or touching corals, not littering, and using reef-safe sunscreen to help preserve the marine ecosystem for the long term.

• By Car: From Ranong town, drive toward Kapoe District (Ranong → Kapoe route). The distance is  50–60 km and takes about 1 hour.

• By Long-tail Boat (Private Charter): Takes  30–40 minutes. Ideal for groups and allows island hopping within the Mu Ko Kam archipelago.