What’s That? #12

It’s week #12 of What’s That?

Each week I show small close-up photographs of three different well-known places in and around Washington, DC.

The first person to get all three wins recognition of his or her genius when I reveal the answers a few days later.

Post your guesses in the comments. Comments will be hidden until the winner is announced. I’ll credit the first person to get each of the three individually as well as the person who first correctly guesses all three.

Update by David: I originally set up the comments incorrectly so they were showing. They’re hidden now.