Photo by: Brian J. McMorrow
A beautiful piece of history, also a very romantic place! You should visit this amazing fortress (there is an entrance fee) and enjoy the breathtaking view from the main tower:
Anyway, the box is located outside the fortress, so there is no need to visit the fortress in order to find the cache. Even if the area around the coordinates is not so crowded usually, please be stealth while searching for the box! Happy caching!