A Washington Monument

When I first came to DC many years ago for a conference in Annapolis, I came with my friend Stuart and we spent a few days looking around. It was great and we saw all of the usual monuments and sights. At the time one of Stuart's friends who lived here gave us a tour (tip: get a local to show you round, you see more than in the guide books) and took us to see a monument/sculpture/work-of-art that I'd like to find again, but just don't know where to look. It was a giant hand coming up from the ground, near the ocean. Very cool looking. Must take a look through some of the local guide books.