This picturesque setting, where most people still travel on horseback and children play under shady mango trees, is fighting for survival against plans for a 175-mile long shipping canal which would divide Nicaragua in two. From the Pacific to the Caribbean coast, the canal would dissect Central America’s largest lake - the country’s main water source - and force more than 100,000 people from their homes. If the Chinese company tasked with building the canal get the go ahead, it will become the world’s largest engineering project, dwarfing the Panama Canal in size.