According to local folklore, the formation of the Tangkuban Parahu volcano began with a young man SANGKURIANG who fell in love with his own mother, DAYANG SUMBI.
One day, when he was hunting, Sangkuriang accidentally killed his beautiful black dog (Si TUMANG). This dog is actually Sangkuriang's father who had been condemned to live the life of a dog by his GURU.
However, Sangkuriang never knew it.
Sangkuriang had been separated by his mother since childhood. Yet, he was destined to meet his mother again. When on his way home, he stopped at a small village and met and fell in love with a beautiful girl. He didn't realised that the village was his homeland nor that the beautiful girl was his own sacred mother (remain young & pretty).
Their love grew naturally and one day, when they were discussing their wedding plans, Dayang Sumbi suddenly realised that the profile of Sangkuriang's head matched that of her only son's who had left twenty years earlier. How could shee marry her own son? But she did not wish to dissapoint him by cancelling the wedding. So, although she agreed to marry Sangkuriang, she would do so only on the condition that he provide her with a lake and a boat with which they could sail on the dawn of their wedding day.
Sangkuriang accepted this condition and built a lake by damming the Citarum river. Wiath a dawn just moment away and the boat almost complete, Dayang Sumbi realised that Sangkuriang would fulfill the condition she had set. With a wave of her supernatural shawl, she lit up the eastern horizon with flashes of light. Deceived by false dawn, the cock crowed and farmers rose for the new day.
With his work not yet complete, Sangkurinag realised that his endeavour were lost. With all his anger, he kicked the boat that he himself had built. The boat fell over and, in so doing become the mountain TANGKUBAN PARAHU (in Sundanese, TANGKUBAN means upturned or upside down, and PARAHU means boat). With the dam torn assunder, the water drained from the lake becoming a wide plain and nowaday became a city called BANDUNG (from the word BENDUNG, which means Dam).