This is The Spasskaya Tower (Спасская башня), one of the many beautiful sights on The Red Square (Красная площадь), which it overlooks. It was already 10 pm (as you can see on the Klremlin Clock) when it was starting to get dark and it looked like it was going to rain. I thought the tower looked cool reaching into the conspiring clouds.
This also is a good example of what HDR does. Here are the 3 shots with different exposures. The first is the normal one.
And here’s the end result.