unique octagonal castle castel del monte,puglia,italy.

age ancient andria apulia architecture attraction bari building castel casteorld castle castlepugliaitaly citadel culture del destination emperor europe european famous fortification fortress frederick heritag heritage hill historic italian italy italyunique landmark landmarks landscape medieval mediterranean middle monte montepugliaitaly monument mountain octagon octagonal old orld outdoor palace park popular puglia roman site southern tourism tourist touristic tower travel trees unesco unique world