Wide sidewalks are generally a good thing, but if they are too wide for the volume of pedestrians, they can seem desolate. That’s how I used to feel about the wide stretch of sidewalk along 19th Street NW as it nears L Street. Then, a couple of years ago, the Golden Triangle Business Improvement District (BID) and the city partnered to turn some of the sidewalk into rain gardens. Four separate rain gardens were carved out, on each quadrant of the 19th and L intersection.  When I walked on L Street recently, I was pleasantly surprised to find that the BID had taken the rain gardens up a notch by installing four sculptures by the artist Foon Sham. The wood block sculptures look like giant jars for collecting water, representing the role of a rain garden.