hungary - castle of boldogko boldogkő in zemplen mountain.

13th aerial ancient architecture attraction boldogko boldogkovaralja boldogkő boldogkőváralja borsod bricks building castle century countryside covid defense destination dramatic drone europe field fort fortification fortress hill hills hilltop historic historical history hungarian hungary landmark landscape medieval mountain old ruins snow stone stronghold time tourism tourist touristic travel view wall watchtower winter zemplen