Thanks for the comments Jon and Labonte.
Cruzin, here comes some history for you. (About the second castle.)
Per Brahe, Gustav Vasas (old swedish king) brothers son, became a duke and was given Visingsö, and after a while he expanded it to 120 km2 all over Sweden.
The basics of the castle was made in the 1560 and they ruined 3 villages to be able to build it. This was the first castle of 3, the so called triangle system.
The castle had around 800 people in it, so it was a lot bigger than what we can see from the photos.
At 1717 - 1718 the castle held 2000 Russian war prisoners. 1718 the Swedish king died, and the war prisoners at the dukes place escaped/made a rebellion and they set the whole place on fire.
Here is also a picture how the castle looked before. As you can notice only little part of it is left plus the dark cellars under the ground.