This Oman fortress where limestone walls surround a sinkhole that swallowed 4000 years of frankincense trade
Deep in Oman’s Empty Quarter, where endless sand meets limitless sky, ancient limestone walls rise from ochre dunes around a massive void. This is Ubar, the frankincense fortress that swallowed itself. Built over a hidden cavern 4,000 years ago, the citadel collapsed into a spectacular sinkhole between 100-200 CE, leaving visitors today to peer into … Lire plus









