Land at Kochi and meet your friends; collect luggage and head to Fort Kochi/Ernakulam for a budget stay. It's best to rest and start early next morning.
See Kerala’s largest waterfall and scenic forest surroundings; best in the morning for photos and fewer crowds. Falls area generally accessible 8:00am–5:00pm.
Explore JatayuRock (large mythical bird sculpture), cable car, and adventure activities; the park is open ~9:00am–6:00pm — plan to arrive before closing.
Explore the shore, see the Vivekananda Rock Memorial / Thiruvalluvar Statue from the shore (ferry timings vary; shore and sunset views accessible later). Ferry to Vivekananda Rock typically runs ~7:00am–5:00pm but may close earlier, so check on-the-day; sunset on the shore is free and spectacular.
Catch your pre-booked overnight train or bus back toward Bangalore/Vijayawada or to Trivandrum for onward connections. Book trains/buses in advance if possible.