Kastell van Mesen (Castle of Mesen) dates back to 1628. The structure and gardens include a Gothic Revival chapel and had many lives including a royal residence, a gin distillery, a sugar refinery, a tobacco factory, and a boarding school for girls funded by Belgian aristocracy. After the school closed, the Ministry of Defense took over the castle and it sat vacant and deteriorating for years. For decades it remained an architectural ghost of its past, and one of the most impressive abandoned castles in Europe. Sadly, despite conservationist efforts, the castle was demolished in 2010.
(Images via Urban Ghosts)