The remains of the town - specifically the ruins of a fortress and of the little church of Santa Maria della Pietà - are particularly suggestive;since they rise about 1500 meters above the sea-level on the Gran Sasso Mountains.The fortress of Calascio;fortified and enlarged in the XV century by order of the family Piccolomini;is one of the highest bastions in Italy.From its height it overlooks the plain of Navelli and the Tirino Valley.It consists of a square plan with four corner-towers.The entrance door lies five meters above the ground;which made suppose that a wood ladder was used to enter the building and then withdrawn.Near the ruins there is the little church of Santa Maria della Pietà;situated over a former votive chapel.The present building;dating back to the XVI century;has an octagonal plan surmounted by a cupola made up of eight sections;the sacristy is built against one of the external facades of the church.