Where the flat plains of Bangladesh end, the Indian state of Meghalaya starts to rise up. The mountain range of Khasi Hills is the first barrier for the monsoon coming from the south. The hills have the title of "the wettest place on earth" with the annual rainfall about 11 000 mm. Having in mind, that the monsoon can last up to 6 months, the amount of rain is comparable with the wettest tropical regions that receive the same amount of rainfall but throughout an entire year. In the year 1861 the region received 9 300 mm of rain throughout the month of July. Just for the reference an average annual rainfall in Poland is about 600 mm.