Travelers are voting Co Loa as the best ruin in Hanoi. There is 2 ruins in Hạ Long a city just 146 km from Hanoi. The most popular of these is My Son in Hạ Long. You can find 1 ruin in Red River Delta and 8 ruins in the country of Vietnam. Our members favorite in Red River Delta is Co Loa and My Son is the top pick in Vietnam. Want more? Check out our map of ruins in Hanoi.