On July 24, 2021, the participants of the course were given an excursion to the salt mine in Soledar. Applicants had a unique opportunity to visit at a depth of 200 meters underground and walk through the slums of the ancient world salt ocean. Familiarity with the labyrinths of the salt kingdom fascinated everyone, and the opportunity to touch the exhibits of the museum of salt production was even more exciting. During the tour, students learned a lot of interesting things about the healing properties of salt, visited an art gallery and a functioning underground temple.