Not bad as in unsafe, just a bland block of high rise offices that’s dead at 6pm. It’s on public transit and close to good stuff, it’s just funny as you’d normally never send a tourist there on purpose.
You can also walk from Rosslyn to the Mt. Vernon trail, and to the nearby Roosevelt Island where there's some nice hiking trails and a big monument to Teddy Roosevelt in the middle where people like to sit and relax. There's fountains there, running at some times during the year. Then you can continue walking on the Mt. Vernon trail to Gravelly Point next to DCA airport and watch airplanes take off. If you want to keep walking, you can go to Old Town Alexandria, or even farther to Mount Vernon, but it's a lot better to use a bicycle for these treks.
Edit: Lol, I see Washinton DC has got one too.
...back when the Newseum was there anyway, before their poorly-decided move to DC and subsequent closure.