Here you have one of the limestone hills, they recall Halong Bay. This place is also know as "Halong Bay without water". Some people also compare this place to Guilin, in China.
The tours you book in Hanoi include lunch. Usually it is a very basic menu. Some vegetables, fried tofu, steamed rice and a fruit for desert. Drinks are, most of the times, not included. Vietnamese food is one of the most delicious I have ever tasted. I always regretted having paid for the food in these tours. It is much better if you order "a la carte" in the restaurants. It will cost you some US dollars more, but you will enjoy your meal.