Castles
Special tourist attractions of Jura Krakowsko- Częstochowska are fortified castles called "Eagle Nests" constructed of limestone on hilltops. Looking at these buildings from the distance their structures seem to be a unity with the rocks they were built on.
http://orlegniazda.pl/pl/t/Zloty_Certyfikat_dla_Szlaku_Orlich_Gniazd
Photo: Archive of the Jurassic Communities Association