Derbent is not just an ancient city. Derbent is the salty sea air of the Caspian Sea, ancient city blocks, a peculiar way of life and dozens of voices, speaking in different languages on almost every corner. In the new episode of the Let's Go TV project, the presenter will visit the oldest mosque in Russia, visit medieval baths and get acquainted with real Kubachi masters who create weapons of amazing beauty.

Telescopes. The eyes and ears of man in the universe. Today it is impossible to imagine the study of outer space without these tools. In the mountains of Karachay-Cherkessia, the largest telescope in Eurasia, the Large Azimuth Telescope, has been operating at the Special Astrophysical Observatory of the Russian Academy of Sciences for forty years. Every night, scientists from different countries conduct observations of distant stars and galaxies here.