Through medieval castles on Jezeří

A trip to Jezeří Castle, this time through little-known medieval guard castles.
I come from Černice, where public transport goes from Litvínov. Modrá TZ runs along an artificial channel that diverts the waters of the Albrechtický and Šramnický brooks outside the territory of the Czechoslovak Army coal mine. At the southern portal of the Albrechtická tunnel, it connects to a wide path that leads along the contour on the slope of Černické vrch to the beginning of the valley...