Admire and photograph the towers lit at night; if you want the Skybridge/Observation Deck, pre-book slots (tours run most days — check online for exact time slots).
Head up KL Tower for panoramic views (observation deck open to late evening). Consider reserving dinner at Atmosphere 360 — the revolving restaurant at the tower (book ahead).
Popular full-day speedboat trip visiting Maya Bay viewpoint, Viking Cave, snorkel stops, and Phi Phi Don; tours typically depart around 7:00–8:00 and return by late afternoon (approx 4:00–5:00pm).
Full-day trip (typical 8:00–17:00) that includes sea canoeing through caves, visiting James Bond Island and Koh Panyee fishing village; tours usually include lunch.
If you still want islands, a half-day trip to Racha or Coral Island gives snorkeling and clear water close to Phuket; otherwise enjoy Kata or Karon beach.
Take a direct or one-stop flight back to Hyderabad; flight durations vary — check current schedules and book an afternoon flight to arrive home on the same night.