One of the main architectural attractions of the city is the Derbent wall, a length of more than 3500 m. It is a double wall that has existed since the time of the Sassanids, originates from the fortress Naryn-Kala, and ends in the waters of the Caspian sea.

Derbent wall more than 15 centuries has been used for defensive purposes during the invasion of the Arabs, Mongols and Persians. How much she had to endure struggles, historians are still not known. The North and South walls are parallel to each other at a distance of 300-400 m. the Mountainous part of the wall goes to 40 km in the direction of the Caucasus mountains. Today only fragments of the once magnificent building. The marine part of the wall out to 500 m into the sea, thereby blocking the entrance to the Harbor. The South wall is a later, it was demolished in the XIX century Northern wall largely retains its original appearance.

The lower part of the walls built of mud bricks, although the main buildings wall, Dating from the VI century, were built of large blocks of hewn stone. The pier between the rows of stone blocks was sabutan ragged stone. For construction masons lime mortar was used. Small block sizes indicate a later construction period. Masonry builders alternated blocks "plinth" and "face", this makes the walls stronger. The average height of the walls is about 12 m, and the thickness from 220 to 380 see

Along the wall along its entire length almost equal distance from each other were established 73 tower. They were constructed of dark mud bricks. Unfortunately, until today, remained only 46 towers.

Gate times of the Sassanids have an interesting architectural solution. 14 pristine gate, only 9: three in the North, four in the South wall, two in the fortress. In the middle ages the so-called stone gate was rebuilt, gate Forty - XVII century, and Pasticcio and the Average gate - after Dagestan became part of the Russian Empire.

Derbent wall - monument of ancient Persian architecture, a UNESCO world heritage site.