DC—The central tower of the National Cathedral has been off limits since the earthquake last summer, but it has been deemed structurally sound and will be open for one day on Saturday, March 24 in honor of the annual Tower Climb. If you can make it up the 333 steps you can say you've been to the highest point in the District. [CurbedInbox; OfficialSite]
TYSONS—The 25-story building planned for the stretch of Route 7 near Spring Hill Road has broken ground in the hopes it can keep pace with the Silver Line Metro station going in right next door. [TTC]