Historic temple with the giant Reclining Buddha and traditional Thai massage school; open roughly 8:00–18:30 and close earlier for ceremonies occasionally.
Cross the Chao Phraya to view/enter Wat Arun; the spires glow at golden hour (visitors typically allowed until ~17:30–18:00; riverside views remain after).
Take a public or tourist river boat upstream/downstream to see lit temples and cityscapes (public boats run early morning–~19:00, tourist cruises later).
If you want the spectacular sunrise over Phang Nga Bay, depart very early (~4:30–5:00) from Phuket/Phang Nga to reach the viewpoint by 05:30–06:30; be prepared for a short hike and cooler air.
Half- to full-day tour exploring limestone karsts, sea caves (hongs) and local fishing villages — most tours depart 7:30–9:00 and include kayaking and lunch.
Relaxed beachfront dinner at Panwa-area hotels or a peaceful local restaurant on Koh Yao Yai; hotels serve dinner through the evening (until ~21:00–22:00).
Return to Phuket early to catch a full-day speedboat transfer to Phi Phi (tours usually depart 7:00–8:00) — arrive early to maximise snorkeling and Maya Bay viewing time.
Visit iconic Maya Bay (viewing may be restricted or regulated — many tours show the bay from outside) plus snorkeling at nearby reefs for colorful fish and clear water.
Leisurely hotel breakfast and a little pool time — good wind-down day after several travel-intensive days; hotel breakfasts typically open from 6:30–10:30.
Allow 90–120 minutes for airport check-in and transfer; choose an evening flight to arrive in Bangkok with time for any last-minute shopping if needed.
If you arrive in Bangkok early and have energy, hit IconSiam or MBK for final shopping (malls open until ~21:00), otherwise proceed to airport or hotel and conclude the trip.