This is a small ruin close to the city Gränna in Sweden. It is named Brahehus and I visited it when I was traveling home from Stockholm this summer. The ruin is placed high up on mountain which gives visitors a nice view of the landscape and the adjacent lake Vättern. I have included below some information about the place that is from the tourist information board I found at the place.

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"Brahehus was built by the Lord High Chancellor, Per Brahe the Younger, in the mid-17th century. It was originally intended as a country retreat, but in 1645 there was a change of plan. Instead the castle was now to be a dower house for Per Brahe the Younger's wife, Kristina Katarina Stenbock. She died, however a couple of years later, and the castle come to be used as guest accomodation instead. After being revaged by fire in 1708, it fell into decay. Some resoration work has been done during the present century."

"Warning for collapse" (literal translation)

A tourist enjoying the view.