The hunting lodge, Mayerling.
One day we took a bus tour of the nearby Vienna Woods, a rural area with protected land, some small towns and farms, kind of like the national parks we have in the States. We stopped briefly outside Mayerling, a small town with what today is an abbey but during the time frame in the book was the hunting lodge for Austria's Crown Prince Rudolf. The lodge was the location of Rudolf's suicide and his 17 year-old mistress' murder while Rudolf's wife was away. It was a scandalous, mysterious event.
I wanted to read the book to learn more about their relationship and the murder-suicide. Of the 30 chapters in the book, however, Morton really only dedicated about two chapters completely to Rudolf and Mary Vetsera's relationship and infatuation with each other, so that wasn't quite what I expected. The book did provide me with a few nuggets of good information and in parts was a good complement to the recent vacation.