Just outside the town centre there is a small tea factory called Pedro Tea Estate. It is about four miles from the bus Station. Hire a Tuk-Tuk to take you there. Haggle a price for him to wait and take you back. The tour does not take long. Plan to go in the morning or afternoon. It is closed between 12.30pm and 2pm. Most of the tour is inside the factory so this is an ideal venue to visit if it is raining.
In the tropics that means most afternoons. You do not have to book. The cost of the entrance ticket is cheap. You have to wear an apron. Strangely you are not allowed to take photographs inside the factory. All the Pedro Estate tea is sent to Colombo tea auctions where it is purchased for export by the big global tea houses and some is sold for the local market.