IMP Advice : I personally found the airport immigration service very lethargic and frustrating. Do carry passport size photograph for people going with Visa on arrival option.
As it was a two day trip we had very less time to explore.
1. Checked into hotels
2. Explored the city by walking.
3. Visited War Museum.
4. Local restaurants. Great veg and non veg options. Don't forget to sip up popular coffee varieties.
5. Explored botanical garden and few other museums