The Mosque of Córdoba was the biggest one in the world once all the extensions were concluded in the tenth century. More than 20,000 people could fit inside and it was declared World Heritage in 1984. All travelers who visited the Mosque were dazzled when they saw its beauty. You shouldn’t leave Córdoba without visiting its main touristic attraction! Its characteristic double arches and its impressive mihrab will leave you speechless. The monument houses multiple architectonical styles, which makes it unique in the world.