Absolutely, I'd love to help you plan your 3-day adventure in Vietnam! Let's dive into the perfect itinerary for you.

Day 1: Hanoi

Start your day with a delicious bowl of pho, the iconic Vietnamese noodle soup, at a local street food stall in Hanoi. After breakfast, head to the historic Old Quarter to explore the bustling streets filled with shops, markets, and traditional architecture. Don't miss the chance to visit the Temple of Literature, Vietnam's first university.

For lunch, indulge in some banh mi, a tasty Vietnamese sandwich, before visiting the Hoan Kiem Lake and Ngoc Son Temple. In the afternoon, take a cyclo ride around the city to get a unique perspective of Hanoi's vibrant culture.

In the evening, treat yourself to a traditional water puppet show followed by a dinner of bun cha, a local specialty of grilled pork and noodles.

Day 2: Halong Bay

Embark on a day trip to the stunning Halong Bay, a UNESCO World Heritage Site known for its emerald waters and towering limestone islands. Enjoy a cruise around the bay, exploring hidden caves, floating villages, and picturesque beaches. Don't forget to try some fresh seafood for lunch on board.

In the afternoon, you can go kayaking or swimming in the bay's crystal-clear waters. As the sun sets, relax on the deck of the boat and take in the breathtaking views of the limestone karsts silhouetted against the sky.

Day 3: Hoi An

Fly to Hoi An, a charming ancient town known for its well-preserved architecture and lantern-lit streets. Start your day with a visit to the Japanese Covered Bridge, a symbol of Hoi An, and explore the colorful markets and tailor shops in the town.

For lunch, savor some cao lau, a local noodle dish, before taking a leisurely bike ride to the nearby Tra Que vegetable village. Here, you can learn about traditional farming practices and even try your hand at planting some vegetables.

In the evening, join a cooking class to learn how to make some delicious Vietnamese dishes before strolling through the lantern-lit streets of Hoi An, creating a magical atmosphere.

I hope this itinerary gives you a taste of the beauty and culture of Vietnam. Enjoy your trip!