International visitors to Hanoi for the first time, If you don’t know where to go, just jump on and wander around. Below are the buses’ route numbers to famous destinations in and around Hanoi:
• 07, 17, 90: Watch the iron birds fly at Noi Bai Airport
• 20, 67: Go to Son Tay to eat Banh Te, see the ancient citadel
• 35B, 63, 112: Go to Hai Ba Trung Temple
• 39, 62, CNG05: See Van Dien cemetery, in the evening
• 46: Go to Co Loa Citadel, eat porridge at Co Loa market
• 47: Go to Bat Trang village to make pottery
• 56B: Go to Soc temple
• 64: Go to Ham Lon lake, Viet Phu Thanh Chuong
• 65: Go to Sai temple
• 69: Go to Vinhomes Ocean Park to see the sea right in the heart of the capital
• 74: Go to Khai Nguyen pagoda
• 89: Go to Tay Phuong pagoda
• 92: Go to Duong Lam ancient village
• 95: Go to Teacher University
• 101A, 102, 103, 115: Eat Van Dinh grilled duck
• 103: Go to Perfume Pagoda
• 107: Go to the Vietnamese ethnic cultural village
• 110, 119 (with motorbike taxi): go to Ba Vi National Park
• 111, 118: Go to Suoi Lake
• 117, CNG01: See the lonely banyan tree (Thach That district)
• 125: Go to Doan Nu village – An My commune – My Duc district to see the cotton flowers
• CNG01, CNG07: Go to Thay Pagoda – Tours in Hanoi
• CNG07: Go to Tram mountain
Source: https://hanoitraveltour.com/blog/traveling-around-hanoi-by-bus.htm