Another street art cache, a painted glimpse of Hanoi as it may have been a century ago. You are close to Phu Tay Ho, one of the most popular shrines in Hanoi... busy on any day with Hanoians come to pray the Mother Goddesses, but try parking your bike on a new moon ! It has a beautiful old tree, the rest of the architecture has been updated somewhat garishly, it is still worth a visit for people watching and for the sunset views.
The cache is outside of the shrine, and next to a quiet fishing spot. You will have beautiful Hanoi skyline views to the South. Lots of chilled cafés nearby.