The Castle of Detroit was a fortress in the town of Detroit. It was discovered by Madritian explorers the 7th of March in 2015 by the Madrid Institute of Research and Investigation (MIoRI). It was a medium size building, more small than big. It had wood walls and two cobblestone towers. The town lays abandoned, and the fortress is in ruins.
However, there is a theory that states that it actually is not in ruins, but that it never was finished, and stayed that way. It was demolished by MajorPAIN40 and the government of New Detroit