Kunstmuseum Gehrke-Remund is an unusual Baden-Baden museum: a privately run space devoted to Frida Kahlo, with reproductions, contextual material, and Mexican cultural references rather than a broad survey collection. In a spa town known for casinos and 19th-century elegance, it is a surprising detour.
Go if the subject interests you, and read the museum's description carefully so expectations match the collection. It is more focused interpretation than blockbuster original-masterpiece museum, but that focus can be exactly its charm.