Found this well in my native place - Chendia in Karwar.
It's strange that I never noticed this semi-circular well in any of the previous visits.
There's an old temple in the same lane as our house; though I am atheist, I liked (plz. note the past tense) visiting that temple as it was supposed to a temple my great granny was deeply connected too. Also, because of the pond next to the temple, where there were once crocodiles. Exactly opposite to this temple, is a house that has this semi-circular well.
Now, why past tense for liked visiting the temple - the last time I had been there was because the temple was renovated - the idol of the goddess & the entire template was a new one now. It was very heartbreaking to see a concrete building in place of that sweet old, cool temple.