Bimmah Sinkhole, also known as Hawiyat Najm, is a stunning natural sinkhole located in Dibab, Oman. It is a popular tourist attraction, known for its clear turquoise water and picturesque surroundings. The sinkhole is believed to have been formed either by a natural collapse of the underground limestone or by a meteorite impact, as the name "Hawiyat Najm" translates to "The Falling Star" in Arabic.