Page:Popular Science Monthly Volume 2.djvu/544



 1. Puzzuoli, where the relative level of land and sea has changed, twice since the Christian era, from 20 to 30 feet. 2. Temple of Serapis, built long before Christ; three columns still standing. 3.  Caligula's Bridge, 1,800 years old; several piers and arches still standing. 5. Monte Nuovo thrown up by an earthquake (see page 515).