Head to Phong Nha area! It’s beautiful there. And wander the little alleyways around Hanoi. Trek the valleys of Sapa. Hire a bicycle around Hoi An. And see the fire breathing dragon bridge in Da Nang! I love Vietnam so much 🥰 I have more info here and on my IG highlights if you need it :) https://carryononly.org/category/vietnam/

Agree with the comment below: Sapa would be nice , also Hoi An: there are actually many activities you can do like attend a pottery class or ride a bike , taste the best Banh Mi at Banh Mi Queen, spot the beautiful lantern activity. Da Nang is good too, Ba Na Hills, Bach Ma National Park, Marble Mountains. Let’s connect on ig, have been staying in Vietnam for the past 6 months and will be happy to help if anything.

Ha Giang Loop! I just got back yesterday and it was a fantastic experience.