The father of modern Swedish literature spent the last five years of his life here, in "The Blue Tower" at the cool northern end of Drottninggatan. This three-room apartment is the only one of August Strindberg's 24 Stockholm addresses that you can visit. Today it is a time-warp museum filled with stuff the angry man left behind, divided into his apartment and the room on the sixth floor he had to rent to house his 3,000-book library—a trick he could have pulled off with a high-density flash drive if he were alive today. So it goes. Don't miss the snippets of his writing embedded in the middle of the street outside.