An intriguing geographical feature of Yallahs is the two salt ponds which lie to the east of the Yallahs fording. The ponds are incredibly saline (some say up to 10 times as salty as the ocean) and used to emit a terrible stench (due to the high concentration of hydrogen sulphide generated by the bacteria which thrive in these salty conditions). In 1902 it is reported that the aroma was so pungent it could be smelt as far away as Kingston. However, channels were cut linking the ponds to the open ocean, this greatly reduced the smell.