Barcelona Ghost Night Walking Tour. After the Spanish sun sinks into the horizon, the restless souls of Barcelona begin to roam the serpentine streets, allowing you to discover the sinister secrets of Barcelona on a 2-hour ghost walking tour of the city. Listen to terrifying tales of witchcraft, exorcisms and paranormal activity as you learn about the gruesome past of legendary landmarks like the Arc de Triomf and the Church of Santa Maria. Wander through darkened neighborhoods and feel the eerie atmosphere that the cover of darkness bestows upon the Catalonian capital. Book and Save 10%! Barcelona Ghost Night Walking Tour.