I just have one more set of photos remaining to be uploaded. These photos were taken while driving down the hill. I will upload them as soon as possible.
I would like to add some more information:
1. Food could be a problem for people living in cities going to Kolli hills. Breakfast was very good (dosas, idly, chutnies etc were good). We had food only from Nallathambi resorts. I heard from local people and from other visitors in that place say that the restaurent in the bus terminus in Semmedu serves pretty good food (though the looks of the restaurent will not be good). But I did not have time to validate it.
The food being served is safe but lacks in taste. I would suggest to stick largely to veg food (which was better than non-veg) and may be try one or two non-veg dishes.
Plus, its beneficial if you carry other eatables that will stand replacement for food.
2. Power supply was very intermitent in the day. In the night, they were stable. It will be good if you can carry 4/5 candles, just as an emergency.
3. Mobile network connectivity was very less (almost no network). Airtel and Vodafone were the ones we had. In very specific points we had connection. Practically, it is not possible to go that point everytime to speak. You can just go there to convey back home "I have reached safely".
4. If you are planning a two day trip, its best if you reach the base of the hills by 8:00/9:00AM on the first day. You can have a leisure drive uphill and take some rest before you start for the waterfalls. It will take 35-45 minutes just to walk down to the waterfalls. An average nature lover can easily spend 4-5 hours in the waterfalls. I guess you can also trek from the waterfalls.
Please carry required amount of drinking water and some eatables to the waterfalls. You may be burning calories in this place.
Its best if you can return before dusk back to the hotel from the waterfalls. Being a less populated place, finding directions was difficult after dusk and not many people you will find to assist.
5. In the resort, we could find many come as whole family like 10-15 members and stay there for a week. They infact had stoves and they were cooking themselves. I did ask the resort guy if they can provide us with cooking gas cylinder. He said, its a possibility. You can buy vegetables, chicken etc from the Semmedu town. Being a very inexpensive place, for those who want to break away from city life for a week, this may be a good place. And the best thing was; there were not many things to do and you will have to sit with your family members.
6. People who want to have a real trekking experience, can trek from base of the hills (Puliyancholai) to the hill top. Puliyancholai is on the other side of the hill when compared to the side that has the entrance to the Kolli hills. To reach puliyancholai, you have to take Rasipuram-> Thammampati route. Or you have to take Namakkal-> Thuraiyur route. I have seen one good travelogue written by a person who did the trek from the base to hill top. Please search in Google for more details.
7. Alternate accomodations. There was a lodge called PA lodge. Not much information is available in the internet and I saw the lodge. By the looks, I felt it may be okay for bachelors.
A software person in Bangalore has started a resort there. Details are available in:
Kolli Hill Resorts - kolli hills
From the photos, the swiss cottages seemed to be more comfortable. But, we wanted to go on a shoe string budget. This person quoted Rs.800 for a person in this Kolli hills resorts. In Nallathambi, we paid Rs.840 for two rooms (for four of us)
9. Its best you enquire if there was sufficient water flow in the falls before you decide to go; as that was the main attraction there. People there told its a perenial waterfalls, but amount of water that flows may depend on the season.
10. The local people were very good. They were helpful and they were happy to help. When I stopped the car to ask for directions, I found many people approach to help me.