More or less Haputale itself won't keep you busy sightseeing because apart from the tiny commercial centre, there is nothing else to do.
So one of the best things is walk around and find yoursef a nice spot to enjoy the extraordinary views.
the village lies on the top of a hill therefore it enjoys nice views over the hilly country inland and the southern plains as well.
Keep in mind though that humidity clouds rise by early mid day so don't expect undisturbed bird's eye views all day long.
East of Haputale a scenic road by the cliff leads after 10kms to Dambatenne Tea Factory (this is the starting point for Lipton's seat). This was built in 1890 by Sir thomas Lipton (yes the well known tea tade name).
Being one of the most impressive, this factory preserves its colonial-era equipment. You can follow a short tour (at a cost which is similar to a day's wage of a tea collector!!) of the process done from the time tea leaves arrive to the factory until the tea we all know is packed and ready for export.
Unfortunately you can't buy tea directly from the factory.
You can reach the factory by bus from Haputale.
As mentioned in any guidebook, the most scenic way to reach Haputale is the train from Kandy. The journey allows you to enjoy excellent views over the hill country.
Nevertheless I did it by means of bus and taxi and I can say the journey was as enjoyable as well, specially when driving through the endless tea fields.
But note that train tickets pecially for upper class are easily sold out and better reserve one at least a few days before.
Diyaluma falls are the second largest in Sri Lanka. Their height is 220m and the water is falling from a narrow single slender cascade forming as soon as it reaches the ground numerous pools with fresh water. It's a relaxing short visit and while you're travelling around in the hilly part of Sri Lanka a really refreshing opportunity to have a swim in one of them (as I did).
Now there are good news for the adventurous types: there is a steep path leading to the top. My spanish friend did it and said that it worth it, as there are several natural rock pools where you can take off your clothes and swim in complete privacy!!
To reach Diyaluma falls you can take the bus from Haputale to Wellaya (it's worth the ride as you have splendid vies over the plains). There is a bus stop just opposite the falls