Idikundu

Idikundu (Idi-kun-du), translates in Tamil to 'Thunder Well', is a natural water well in Navaly, Jaffna District, Sri Lanka. Legend says it was created by a lightning strike in the early 20th century; some speculate it might be an asteroid that struck. 
The depth of this water well is so deep and it is unknown; it is also an unpopular location as some locals use this well to commit suicide. In the same Jaffna District, there is another natural water well in the suburb of Nilavarai.