Overlooking the lake, and considered one of the finest early Renaissance buildings in the Nordic region, Vadstena Slott was the family project of the early Vasa kings; their gloomy portraits are on view, along with a modest historical display. The furnished upper floors are the most interesting, and be sure to visit the chapel, with its incredible 17-second echo! There are guided tours (in English) mid-July to mid-September; call ahead for times.
