Mumbai (also still known as Bombay) will hit you full force with urban energy, more so than any place on the subcontinent. The streets are teeming with people, bicycles, rickshaws, cars, trucks, and wandering animals. With a population of 21 million, it can be overwhelming, but once you get adjusted, you will appreciate the city’s rhythm, culture, and peaceful neighborhoods — some facing the Indian Ocean, such as along the Marine Drive promenade.