Ecotourism activities at the tiger reserve are held at the buffer zones of the tiger reserve, avoiding the core areas. Parambikulam provides visitors with a number of opportunities for nature education. Experienced forest guides accompanies one during trekking, for which the visitors can contact the information centre. There are also opportunities for bamboo rafting that are powered by oarsmen. The reservoirs are sources of drinking water, and power boating are not encouraged. While the local inhabitants are allowed to boat and fish on the lake, visitors are not allowed to boat by themselves on the reservoir. The "Kannimara Thekku Teak Tree", which is said to be World's largest teak tree, is located at Thoonakkadavu.