5. Visit the tea museums of MunnarTo get the best of the highlands of Kerala, visit one of the tea museums in the region. Kannan Devan Hills in the Iddukki district is the biggest and first tea museum of India. A visit to this spot will give you an authentic experience of Kerala's Western Ghats. Unlike other leisure activities, an excursion to the tea estate will be one of the best offbeat things to do in Kerala.