Constantine is Algeria's third-largest city, after Algiers and Oran. It's located in the northeastern corner of this giant North African country, about 80 km (around 50 mi.) south of its Mediterranean coastline. Originally founded by the Phoenecians, it's been the most important city in the region for centuries. Built on a plateau overlooking a ravine of the Rhumel River, it's one of Algeria's most picturesque major cities. You can check it out from above in this excellent drone video by contributor Zagnoun.