[6] The temperature underground is constant at 14–15 °C, with 14.93 PSI air pressure and 60% humidity regardless of the time of the year,[7][8] giving rise to claims of healing properties for lung conditions.

[12] Soledar's long history of mining has created an "underground city" of tunnels[13] that Deutsche Welle described as a "magnet for tourists".

[14] There are guided tours as deep as 200–300 metres (660–980 ft), with attractions including sculptures made of salt crystals.

[15] [13] It was also host to the first-ever underground hot air balloon flight, as listed in the Guinness Book of Records.

[14] This practice is part of the controversial halotherapy industry, in which it is believed that the inhalation of salt dust is a "miracle cure for respiratory illnesses".