1. Monkey Island, April 2018. I really enjoyed my boat tour with Green Trail! Beginning with a cruise through the peaceful waters of Lan Ha Bay, we eventually reached Halong Bay, Northern Vietnam’s most famous waters. There we were treated to swimming, kayaking and a delicious feast of freshly prepared local food. On the way back to Cat Ba Island we made one final stop at Monkey Island, with its small, pretty beach and rocky mountain trail.