It's not every day you see a garden growing VERTICALLY! My wife and I stopped and did a double-take when strolling by this lovely wall, across the street from the famous Prado Museum in Madrid.
A little research revealed that the wall was designed by Patrick Blanc, who specializes in creating vertical gardens. This wall, which is four stories tall, has more than 15,000 plants representing 250 different species. The plants are watered by a drip irrigation system.
The wall was once part of a power plant dating to 1899, but today the building within it has been converted to an arts and cultural center.