Try iconic northern dishes: pho or bun cha; Bun Cha Huong Lien is famous (Obama visit). A quick, authentic introduction to Hanoi's street-food culture.
Stroll the atmospheric lanes, visit Ngoc Son Temple on Hoan Kiem Lake and observe daily street life — a compact, walkable introduction to the city (open all day).
Watch a traditional water-puppet show (evening performances around 7:00–8:30pm are common); great cultural finale to Day 1 — check showtimes and book ahead.
Check-in and enjoy the cruise lunch as the boat begins to weave through limestone karsts — most cruises depart midday; confirm check-in times with operator.
Explore the Japanese Covered Bridge, old merchant houses and the small-ticket Hoi An Old Town area (entry ticket required for several sites; usually open 8:00–21:30).
Dine riverside (Mango Mango or Streets) then take a short lantern-lit boat ride on the Thu Bon River to experience Hoi An’s famous evening lanterns (boat rides run into the evening).
Cruise small canals, visit local workshops making coconut candy and honey tea, short walks on small islands and listen to local music — many operators run 4–6 hour excursions.
Return to the city in the afternoon and, time permitting, visit the War Remnants Museum (open roughly 7:30–17:00, check times) for important historical context.