US first lady Michelle Obama and daughter Sasha are visiting the picturesque southern city of Ronda, once a favorite haunt of actor-director Orson Welles and author Ernest Hemingway. Security was tight as Mrs. Obama toured Santa Maria, a classic Andalusian-style church dedicated to the Virgin Mary. Welles and Hemingway both wrote about Ronda's beauty and colorful bullfighting traditions after living there part-time. Ronda's population of around 37,000 swells each summer as tourists flock to see its sights, including the oldest-known bullring in Spain. Ronda is inland from the coastal resort of Marbella, near where Mrs. Obama is staying.