The Blue Spot

From publisher blurb: Your jungle trek has led you to a bizarre burial ritual. Hidden in the foilage, you observe the locals toss a body into a water source. What you find unusual was that the body was covered in expensive jewelry. If they've thrown one body in, you bet they have thrown in more. Once the natives leave you decided to go for a dip... This adventure setting was designed for 5th Edition AD&D for the Filbar Campaign, for a trio of PCs of second/third level.