Hello. I will spend 1 week in Vietnam next January. I will go to Ho Chi Minh city and stay here for 4 days then flight to Hanoi. I have a half day left before catching the flight in the late afternoon in Hanoi. I'm planing to spend it to do a private tour in Hanoi. Is it worthy to do? Has any one gone before? How much does it cost do you think? I will stay at Golden Lake View hotel. Thanks in advance.