The Guadalupe Viaduct is a reminder of a failed railway project from the 1920s and 1930s that was supposed to connect Badajoz, Madrid, and Huelva. The viaduct spans the entire Guadalupe Valley, offering picturesque views and a great hiking trail for nature lovers. You can follow the trail from Guadalupe to the hermitage of San Blas and then to Santa Catalina, enjoying multiple scenic lookout points along the way. It's an easy hike with stunning sunset views at Santa Catalina - definitely worth checking out!