Ruins of Falkenštejn Castle can be found next to the village Jetřichovice in the Ústí nad Labem Region of the Czech Republic.
The castle was built probably during 13th century. First written mention from 1395 appears in the chronicle of nearby town Česká Kamenice. The castle had changed hands several times. No mention exists that it was ever conquered. Falkenštejn was abandoned during 15th century.
The small castle was located at the top of a sandstone rock very difficult to access, and a ladder was needed to climb into it. The buildings were made of wood. A well was not available, and instead a deep water tank was used.
Wikipedia https://en.wikipedia.org/wiki/Falkenštejn_Castle
Address 40716, Czech Republic
Coordinates 50°51'17.383" N 14°24'19.567" E