Below, we explore 14 of the most breathtaking abandoned cities and towns worldwide, each telling its own hauntingly beautiful tale. Mesa Verde National Park, ColoradoThese cliff dwellings were hand carved by the Ancestral Pueblo people. Set in alcoves, these structures included single-room storage units for food, all the way up to 150-room villages, such as Cliff Palace, which once housed about 100 people. Today, you can visit these marvels of ancient architecture, preserved within Mesa Verde National Park. Stepping inside the structures requires joining a ranger-led tour, but you can also see the cliff dwellings from afar by driving or hiking either the Mesa Top Loop Road or Cliff Palace Loop Road.