The island of Bang Krachao is often known as “Bangkok’s Green Lung,” but also colloquially as “Pig Stomach Island.” This used to be a peninsula formed by a bend of the Chao Phraya River, but these days, a thin canal separates it from the mainland, making it technically an island. Although not located within the limits of Bangkok proper, it is almost completely engulfed by its metro area, making it one of its most important zones of low-rise development and biodiversity in Thailand’s capital. “Pig Stomach” comes from its shape,…