The aqueduct ran under the Decumanus Secundus and terminated at a large fountain in the city centre near the Arch of Caracalla .
The Decumanus Secundus is a street that ran parallel with the Decumanus Maximus .
The aqueduct ran under the Decumanus Secundus , a street that ran parallel with the Decumanus Maximus , and terminated at a large fountain in the city centre near the Arch of Caracalla .