aerial view of sloup castle in northern bohemia, czechia. sloup rock castle in the small town of sloup v cechach, in the liberec

13th aerial ancient antique architecture attraction bohemia bohemian building castle century ceska chateau czech czechia destinations drone dynasty europe fish forest fortress green heritage history impregnable kinsky lake landmark landscape liberec lipa macha medieval monument nature north northern outdoor panorama pond republic rock sandstone sky sloup stone tourism travel view