There are plenty of options beyond this short itinerary- if you have longer you could head to a remote tea plantation and stay in a private bungalow, spend multiple nights on a houseboat, add time at the beach and more.
Day 1 - Cochin Arrival – Munnar
On arrival at Cochin you will be met and introduced to your driver. Depart and head up to the ‘honeymooners’ paradise’, the beautiful hill station of Munnar. Visits en route to waterfalls at Valera and Cheeyappara. This evening enjoy a candlelit dinner with views out into the misty mountains which surround Munnar. Overnight in Munnar.
Day 2 - Munnar Sightseeing
Today is the day to explore the most charming hill station of the region. Start with a visit to Eravikulam National Park to discover the rare species of flora and fauna. Later climb to the Kolukkumalai Tea Estate and watch the spellbinding beauty of the valleys below. Have a fun - filled speed boat ride at Mattupetty Dam and click some memorable moments at Echo Point and Top Station. Enjoy an elephant ride or walk through the tea plantations before returning to the resort.
Day 3 - Munnar – Thekkady
A beautiful drive today to Thekkady and the famous Periyar Wildlife Sanctuary. In the afternoon go for a hike in the forest in search of wildlife. Overnight in Thekkady
Day 4 - Thekkady – Alleppey
Descend from Thekkady and the hills to the backwaters of Kerala. Board your houseboat here and spend the afternoon cruising on the backwaters- there are few more romantic destinations than this anywhere. Overnight on the houseboat
Day 5 - Alleppey – Cochin
Disembark from houseboat around 9.30am and drive back to Cochin. After time in Fort Cochin (the shopping here is great, and there are plenty of interesting historic sites), transfer to Cochin airport and depart
https://www.indianpanorama.in/india-tour-itinerary/kerala-honeymoon-packages