Visit the 19th-century Central Post Office and go shopping at Ben Thanh Market.
Join the Waterfall Restoration Project at Cu Chi Wildlife Rescue Station.
Volunteer at the Animals Asia Bear Centre and explore the Ancient Town of Hoi An.
Assist with teaching English to children at Newborns Vietnam, and then tour the Forbidden Purple City.
Volunteer at Blue Dragon Children's Foundation and then discover the Temple of Literature and Hoan Kiem Lake.
Help out with environmental conservation at Sapa O'Chau, and then trek through the rice terraces.
Visit the Vietnamese Women's Museum and Ngoc Son Temple before departing from Noi Bai International Airport.
If you have extra time, you could also volunteer at the Hanoi SPCA or The Christina Noble Children's Foundation in Ho Chi Minh City. If you have less time, you could skip Sapa and spend more time in Hoi An and Hue. Remember to respect local customs and be cautious of petty crime.