Two mango trees more than 300 years old at Pho Minh Pagoda in Ninh Binh have been recognised as Vietnam Heritage Trees, with one still flourishing despite having a hollow trunk.
Nun Thich Dam Thoan, deputy abbess of Pho Minh Pagoda, said several large branches of the hollow tree broke off in 2018.
The pagoda and site management board have since reinforced the tree with iron supports to prevent collapse during storms and strong winds.
Caretakers also regularly monitor and protect the trees from insects and harmful pests to ensure their long-term survival.