Ahmedabad
What it is. India's first UNESCO World Heritage City — old-town "pols", Sabarmati Ashram, and incredible street food.
Why visit. Gandhi's ashram, the carved Sidi Saiyyed mosque, and a heritage walk through 600-year-old lanes.
Tip. Do the early-morning heritage walk from Swaminarayan temple (7:30 am) — it's the best intro to the old city.