The El Cantara bridge crosses the Rummel Valley of Constantine. The first bridge with a siphon aqueduct was built by the ancient Romans. A new bridge was built over the ruins and its construction was ordered by Salah Bey in 1792 and entrusted to his Maltese architect Bartolomeo. It was then formed of four stone arches. Site of a failed French attack during the Siege of Constantine in 1836. After the bridge collapsed in 1857, it was rebuilt between 1860 and 1863 as the main metal arch above the two cairns. This new bridge linked the monumental gate, but was demolished in 1922 because it had become unsuitable. The bridge was completely redesigned in 1951.

The Emir Abdelkader Mosque is an Algerian mosque located in Constantine in the Emir Abdelkader district. This religious building can accommodate up to 19,000 people and covers a total area of 13 hectares, including the mosque and the buildings of the Islamic University. In 1984, an Islamic university attached to the mosque was established and the opening of the mosque was postponed to 1994. The mosque is both a place of prayer and a university which teaches Islamic sciences. It has two minarets of 107 metres.

The Ahmed Bey Palace is a historic palace in Constantine, Algeria. The palace is considered one of the main tourist sites of the city by a centuries-old architect with an Ottoman air.

The Constantine War Memorial was established to honour the city's children who died during World War I. The names of more than 800 soldiers, Muslims, Christians and Jews from the city of Constantine were inscribed on bronze plaques.