One of Hong Kong’s most unusual sights is the stone wall tree—a mature tree growing directly out of a masonry retaining wall.
These remarkable trees first appeared during the colonial era when thousands of stone retaining walls were built to stabilize Hong Kong's steep hillsides. Over time, seeds carried by birds and wind became lodged in cracks between the granite blocks. Dust, decaying leaves, and moisture accumulated in these crevices, creating tiny pockets of soil where the seeds could germinate.
Credit: Wikimedia Commons
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Hong Kong's Stone Wall Trees
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