World's Most Stunning Sinkhole

The world's most stunning sinkhole: Cavernous limestone bowl is so beautiful it's become a tourist attraction:

They usually hit the headlines for swallowing cars, houses and occasionally whole streets.

But this particular sinkhole in Oman is so stunning it has been turned into a tourist attraction.

The beautiful limestone hollow, in Bimmah, boasts the kind of clear waters normally only seen on holiday postcards.

While similar holes engulf residential streets or open up in front of despairing home owners, the Bimmah sinkhole has long been attracting tourists eager for a picturesque swim.

Stunning: A concrete stairway leads to the base of the picturesque Bimmah sinkhole in Oman, which is several times more beautiful than many others of its type.

Taking a dip: A number of tourists have a swim in the emerald-tinted waters in Bayt al-Afreet, Oman where the Bimmah sinkhole is found.

Inviting: Sinkholes like the stunning one in Oman are formed when groundwater travels through easily-dissolved rock.

Scenic: The sinkhole in Oman boasts the kind of clear waters and dramatic cliff faces normally seen on holiday postcards.

Tranquil: A passer-by stops to take in the unusual view at the Bimmah sinkhole between Qurayat and Sur in Oman.