Remains of ancient fortress walls, Nessebar, Bulgaria

mg2124 travel tourism holiday vacation explore recreation leisure sightseeing tourist attraction tour destination trip journey day out travels destinations journeys holidays vacations nessebar nessebur nesebar nesebur bulgaria bulgarian fortress walls historic historical history culture building buildings architecture ancient old stone stonework mediaeval medieval byzantine ruin ruins tower towers watchtower watchtowers turret turrets lookout fortresses fortified fortification fortifications ramparts dilapidated neglected disrepair crumbling neglect derelict grass hedge hedges hedging wall walled walling people tourists visitors sightseers travelling traveling travellers travelers visit visiting vacationing outdoors outdoor outside horizontal