The skyscraper containing the apartment of the post-scratch Striders, Dirk Strider and his Bro. It is the same building where Dave and his Bro live in the pre-scratch universe, and as such located in Houston, Texas. At least in 2011. In the not too distant future (around the year 2400, more specifically) it is still in the same location, however Houston has been severely flooded and his home is the only one in sight. The lower levels of the skyscraper have been reduced to its metal construction, similar to Dave's home once it entered the Medium.
So far only Dirk's room and the bathroom have been seen, along with part of the living room.