agiou pavlou orthodox monastery at mt athos

afon agion agiou alone ancient architecture athos attraction autumn beautiful belief brick castle cathedral chalkidiki christian christianity church colorful construction cross culture eastern eternity fall foliage fortification fortress god golden great greece greek green heritage hill holy landscape leaves loneliness lonely medieval monastery monk mount mountain old oros orthodox panorama paul pavlou red religion rock sacred saint scenery scenic serenity sightseeing slope spirit spiritual spirituality stone symbol time tourist tradition traditional tranquility travel tree view woods yellow