There is this amazing building on the corner of California Street and Broderick in Pacific Heights. Sometimes I'll go on short walks in the surrounding areas of my work, and one day I came across this small urban college preparatory school for young people.
The outside of the building is covered in pockets in which plants and flowers grow from. On Drew's website it's described as a vertical garden. I have never seen anything like it, but every time I pass by, I can't help but smile and marvel at the idea.