When Iris and I were walking in Paris last week, she spotted this building with plants growing in its walls! It turned out to be Musée du Quai Branly:

Article from The Guardian: How Does Your Garden Grow? - June 26, 2006

The wall of one block, facing the Seine, is already smothered in the dense foliage of no fewer than 15,000 plants of 150 different varieties. The public restaurant looks out towards the Eiffel Tower, which is also reflected in great basins of water. The garden has yet to mature but will eventually encircle the buildings. Designed by Gilles Clement, it features oaks and maples, offset by magnolia, cherry, wisteria, rambler rose, wild clematis and giant Chinese creeper. When they are fully grown, Nouvel’s work will be glimpsed between leaves, blossom and branches. It will not quite vanish like the Tour Sans Fin, yet its impact will be very much less than that of any other French presidential project.