Da Nang is a beautiful coastal city in Vietnam that offers a perfect blend of natural beauty, cultural heritage, and modern amenities. Here's an ideal itinerary for 3 days in Da Nang:

Day 1:

• Start your day with a visit to the Marble Mountains, a cluster of five limestone and marble hills that offer stunning views of the city and the coastline.
• Next, head to the Museum of Cham Sculpture, which houses a vast collection of Cham artifacts and sculptures dating back to the 7th century.
• After lunch, visit the Dragon Bridge, an iconic landmark of Da Nang that spans the Han River and is illuminated at night.
• In the evening, explore the bustling Han Market, where you can shop for souvenirs, local handicrafts, and sample delicious street food.

Day 2:

• Begin your day with a visit to the Ba Na Hills, a mountain resort that offers breathtaking views of the surrounding countryside and a range of attractions, including a French village, a flower garden, and a cable car ride.
• After lunch, head to My Khe Beach, one of the most beautiful beaches in Vietnam, where you can relax, swim, and soak up the sun.
• In the evening, visit the Sun Wheel, a giant Ferris wheel that offers panoramic views of the city and the coastline.

Day 3:

• Start your day with a visit to the Son Tra Peninsula, a nature reserve that is home to a diverse range of flora and fauna, including the rare red-shanked douc langur.
• Next, head to the Linh Ung Pagoda, a Buddhist temple that is famous for its giant statue of the Goddess of Mercy.
• After lunch, visit the Han River Bridge, another iconic landmark of Da Nang that is illuminated at night and offers stunning views of the city.
• In the evening, enjoy a traditional Vietnamese water puppet show at the Nguyen Hien Dinh Theatre.

I hope this itinerary helps you plan your trip to Da Nang and enjoy all that this beautiful city has to offer!