One thing I enjoy is castles and researched a few when writing Sultan of Monte Cristo. So I thought I'd show a few off this week.
Burg of Forchtenstein
Its position is said to be so invincible that the Turks failed to sieze it twice, in 1529 and 1683. It has walls that are 40 feet thick and resides in Austria. As with most castles now a days you can tour it too.