For night photography of this spectacular building, position yourself in front of the Capitol Reflecting Pool, near the General Ulysses Grant Memorial, down the hill, on the west side of the U.S. Capitol Complex. That way, you'll capture the reflection of the whole Capitol Building in the water, provided there's enough moonlight and it's still outside, meaning not a lot of wind. Since it's named "Capitol Reflecting Pool" officially, you understand its true purpose, right?! It kinda took me a while to get it myself.
I recommend going on a night when there's a full moon--and arrive there ahead of the moon's rise, to be prepared to shoot once it does. The moon doesn't stay near the dome of the Capitol for very long. The moon is your best friend to provide optimal light, so take advantage. Just shoot away, don't play it safe. Conditions can change quickly. You might have 5 minutes; might have an hour or so. Obviously, clear skies are needed--pray for that. You'll have company, too, as pro photogs will be shooting at this very spot.
Since you're already on the National Mall, might as well walk it at night. So beautiful. I prefer to see the sights at night anyway, rather than in daytime. And it's safe. One of the most patrolled areas of DC, 24/7. I do this a lot. read more