Question Author
Thank you for all good answers and good ideas!
Delrich, thank you for the information and for sharing your traveling experience. I might not stay much longer in Mumbai. Probabily 2 days sightseeing and then leave. I remember mumbai it is soo overcrowded, rats in the road, if you enter into a shop vendors they give you tea for you to make business with them, the street food and things like that. I want to visit the new mumbai and not the old mumbai. I think it is impossible to travel all around india in 1 month. My main point is to visit taj mahal and come back to diu and do some trips all areas around taj mahal near the ganges river.