A swimming pool covered by a neo-Gothic vault at the Hotel Landa in Burgos, Spain, in June 2026. In August, a celestial spectacle will draw millions to a sparsely populated swath of Spain. (Emilio Parra Doiztua/The New York Times) By MARÍA SÁNCHEZ DÍEZ When a solar eclipse leaves a swath of Spain in darkness on Aug. 12, tourist hot spots like Valencia and Ibiza will be swarming with visitors eager to bask in almost two minutes of totality. The path will also cross quieter, but no less…
