Temple of Juno (Hera Lacina) built 450-460BC 
Cave type openings in the city wall which were used to bury the dead during the Christian Byzantine era (5/6 c AD).
Roman sculptures dating from the Roman occupation of Sicily (3c BC to 5th c AD)
The Temple of Concordia whic was built in 430BC during the Greek occupation in Doric Style and survived even during the Byzantium era as it was converted into a church.
The Temple of Hercules (Heracles) built in 520BC and destroyed by the Christians.
The Temple of Zeus or Jupiter which was the largest temple in existence at its apogee, but now lies in rubble as most of the stones were repurposed for other building construction. It was held up by 19 male and 19 female Telamons / Giants.
The double Temple of Castor and Polluxs only have 3 columns left of one of them. The final temple of Vulcan (Efesto) is now only rubble.

