Take a guided day trip from Hanoi Old Quarter hotels to Ha Long Bay, even if you don't have time for a multi-day cruise. You'll get a taste of the bay's magnetic landscapes. The day trip includes transfers, lunch on the boat, and activities such as admiring stalactites in Surprise Cave, paddling a kayak or riding a bamboo boat to Hang Luon Cave, and climbing to the peak of Titop Island for sweeping views.