Explore the War Remnants Museum, have lunch at Pho 2000, visit the Notre Dame Cathedral, and end the night with a water puppet show.
Take a bike tour to Tra Que Organic Village in the morning. Have lunch at Bale Well, explore the Old Town in the afternoon, and end the night with a lantern river cruise.
Visit the Imperial City, have lunch at Lac Thien Restaurant, explore the Thien Mu Pagoda, and end the night with a traditional Hue-style dinner at Y Thao Garden.
Visit the Ho Chi Minh Mausoleum, have lunch at Bun Cha Huong Lien, explore the Temple of Literature, and end the night with a water puppet show at Thang Long Water Puppet Theatre.
Join a guided tour of the bay, have lunch on the boat, visit the Sung Sot Cave, and end the night with a karaoke party on the boat.
Explore the Trang An Scenic Landscape Complex, have lunch at a local restaurant, visit the Bai Dinh Pagoda, and end the night with a boat ride down the Tam Coc River.
Visit the Hoa Lu Ancient Capital, have lunch at a local restaurant, explore Tam Coc - Bich Dong, and end the night with a farewell dinner at a local restaurant.
Consider a side trip to Sapa to visit ethnic minority villages or visit the Mekong Delta for a boat tour. To maximize your fun, try local foods like banh mi, pho, and bun cha. Don't forget to bargain when shopping at markets. Lastly, don't hesitate to ask locals for recommendations on where to eat or what to see.