Imagine setting off down the beach at one end and walking all day. You walk, and walk, and walk. After hours of walking, the beach still stretches in front of you to the horizon. That's what Cox's Bazar feels like. Most beaches end after a few kilometres at a cliff or a town. This one just keeps going.
The beach was named after a Mr Cox, an English official who lived in Bangladesh hundreds of years ago. 'Bazar' just means market - the place where his old market used to be. Today the town behind the beach is full of seafood restaurants, hotels and shops selling shells.
The Bay of Bengal - the sea Cox's Bazar sits on - is warm and pretty calm in winter, which is why families love going there from December to February. Children fly kites, paddle in the shallows, and ride on horses along the sand. At sunset the sky and the wet beach turn pink and gold together.
Just inland from the beach are green hills and tea gardens. A short boat ride south is St Martin's Island, the only coral island in Bangladesh, where the snorkelling is famous. The whole coastline is one of the country's natural treasures.