the 100 - In The 100, where is the round skyscraper located?

I have found this theory crafters map of the area that the TV show “The 100” is set in.

Now I have tried searching for the skyscraper that seems to be seat of power in the show. The building is round and quite tall. I have searched Washington DC and Annapolis but that is about it. I can't find it. Here is a picture of the building I'm talking about (sorry for not being able to find a better one)

EDIT

here is a bit better picture of the top of the building and the background.

Answer

We don't know

There's been no confirmation of where it is, or if it even exists in the real world. The nuclear war started in the year 2052 so it could have been built after 2016.

The only clues as to the real world location are based on speculation derived from traveling distance to Arkadia, such as Baltimore or Annapolis.

Annapolis was originally the most popular fan theory due to the similarity in the names (consider that Ton DC comes from Washington DC). However Jason Rothberg tweeted that this isn't the reason for the name (and we now know the reason from the show). However it's not clear whether he is saying that it's not Annapolis or just that it doesn't take it's name from Annapolis.