Visit the War Remnants Museum in the morning, which provides a sobering insight on the Vietnam War. Have lunch at Bánh cuốn Tây Hồ for a taste of traditional Vietnamese cuisine. In the evening, visit Bui Vien Walking Street for a vibrant nightlife experience.
Start the day with a visit to the Japanese Covered Bridge, a historic symbol of Hoi An. Spend the afternoon exploring the Ancient Town, a UNESCO World Heritage Site, and the Tailors in Hoi An for handcrafted clothes. End the day with a sunset boat ride on Thu Bon River.
Explore the Imperial City in the morning, which houses palaces and temples built during the Nguyen Dynasty. Have lunch at Ancient Hue Restaurant for traditional Hue-style dishes. In the afternoon, visit Thien Mu Pagoda, the tallest religious building in Vietnam. End the day with a sunset view at the Perfume River.
Visit the Ho Chi Minh Mausoleum Complex in the morning, which includes the Ho Chi Minh Mausoleum, One Pillar Pagoda, and Ho Chi Minh Museum. Have lunch at Cha Ca Thang Long for a Hanoi specialty dish. In the afternoon, visit the Temple of Literature, Vietnam's first university. In the evening, watch a water puppet show at Thang Long Water Puppet Theatre.
Take a morning bus to Ha Long Bay and start a full-day cruise around the bay. Visit Sung Sot Cave, one of the largest and most beautiful caves in Ha Long Bay. Enjoy a seafood lunch on board and then kayak or swim in the bay. End the day with a sunset view of the limestone islands.
Take a morning train to Lao Cai and continue by bus to Sapa. Spend the afternoon trekking to Cat Cat Village, a H'mong ethnic village with beautiful rice terraces. Have dinner at The Hill Station Signature Restaurant for a taste of French and Vietnamese fusion cuisine.
Spend the morning trekking to Ta Van Village, a Red Dao ethnic village with breathtaking scenery. Have lunch at Foodcraft for a western-style meal. In the afternoon, take a cable car to Fansipan Peak, the highest mountain in Indochina. Take the evening train back to Hanoi.
Consider taking a day trip to the Cu Chi Tunnels from Ho Chi Minh City. For an off-the-beaten-path experience, visit the Mekong Delta for a river tour and floating market. To maximize your fun, try a motorbike tour in Hanoi or Hue. Finally, don't forget to try Vietnamese coffee and street food!