Border tower protecting the Castle of Sanoudos in Hora. The wall surrounding the fortress is pentagonal and has three gates. Glezos Tower (Crispi) stands near the northwestern gate and extends in part along the western and northern side of the Castle. It has four floors and it is the only castle in Naxos Island with a round tower attached to it.
Himarrou Fortress
In Filoti area Between Mt. Zas and the sea.
One of the most important monuments of Naxos. It is has a circular plan, 9.20m diameter and 15 metres height.