It is rather spectacular. I have to say before last night I didn't even know it was there.
Here's a little more about it from their web page:
Canal Park provides residents of the District and the region with an unparalleled opportunity to enjoy a unique three-block urban park with seasonal ice skating, interactive water fountains, art sculptures by David Hess, a full-service restaurant with outdoor seating, electric car charging stations, an iconic light cube, and more. Canal Park has been designed as a model of sustainability and a vibrant community gathering place for the surrounding Capitol Riverfront neighborhood. Canal Park is located between Capitol Hill and the Nationals Ballpark at M St SE and 2nd St SE (one block from the Navy Yard Metro Station).