Filled with fresh clear water, the Bimmah Sinkhole in Oman – also known as Hawaiyat Najm (The Falling Star) – is a 40 meter wide and 20 meter deep cavernous hole.
Believed to have been created naturally due to limestone erosion, the sinkhole is one of many in Oman. Located in the Hawiyat Najm Park, it is definitely a place worth visiting.