Not Really A Cave

I've had enough education to know a bit about caves, and the formation of stalactites over thousands of years due to groundwater seepage and the slow dissolving and redeposition of minerals. But somehow I'm thinking that these small stalactites (or possibly soda straws, I couldn't tell for sure) aren't very many years old. I guess under the right conditions, such formations can occur right there on the side of the Russell Senate Office Building. Who knew!