Attend a traditional water-puppet performance at Thang Long Water Puppet Theatre (shows c.3:00pm, 5:30pm, 7:30pm — check schedule), a cultural must-see.
Have an early dinner (try a Hanoi bun or grilled dishes) and get to the train station for an overnight sleeper to Lao Cai; trains typically depart 8:30pm–10:30pm depending on service.
Full-day guided trek through rice terraces, local villages and streams — a great chance to meet Lao Chai and Ta Van communities and photograph terraced landscapes.
Take the cable car up toward Fansipan (cable car opens c.7:00–8:00 and runs until late afternoon); enjoy mountain views and short walks around the summit complex.
Ride the Alpine Coaster found in the Sun World recreation area — an exhilarating ride down mountain tracks. Check operator hours (typically c.8:30am–5:00pm) and weather restrictions; book tickets onsite or via Sun World.
Relax, explore Sapa town’s cafés and craft shops, or visit Silver Waterfall and Love Waterfall (short drives) — waterfall access generally available daylight hours.
Afternoon cycle through the countryside or visit the ancient capital of Hoa Lu — temples open daylight hours; cycling can be self-guided from Tam Coc piers.