Saint Martin's Island, also known as Narikel Jinjira, is a small coral island off the coast of Bangladesh, offering beautiful beaches, coral reefs, and opportunities for snorkeling and diving. It's a popular destination for both solo and group travelers. Accessibility can be challenging, involving boat trips from Teknaf, and internal transport on the island is primarily by foot or cycle rickshaw. The best time to visit is during the dry season (October to March) as the sea can be rough during the monsoon. A typical visit lasts 2-3 days, and costs can vary, but budget around $50-$150 for accommodation, food, and transport depending on your style. Guided tours are available but not essential, as the island is relatively small and easy to navigate independently. Be aware of environmental concerns and avoid littering or damaging the coral reefs.