I see from the newspaper that you've already been actively discussing it, regarding the hint.
http://ru.lotr.wikia.com/wiki/%D0%9C%D0%B5%D0%BD%D0%B5%D0%B3%D1%80%D0%BE%D1%82
Menegroth (English: Menegroth; "Thousand Caves" in Sindarin)
Let's see if this can help.