HCMC, Hanoi, Halong bay, Pu luong, Ninh Binh, Hoi An, phong Nha,Hue, Saigon and Siem reap are the places we want to include. Maybe too busy?? Happy to take any suggestions. We are a couple in 50s, very fit. Love nature. Happy with 3 star accomodation as long as clean and close to main attractions.