Discovered in 1952 by French bio-speleologist Henri Coiffait, the waterfall and accompanying sinkhole were fully mapped in the 1980s by the Spéléo club du Liban. The cave is also known as the "Cave of the Three Bridges." Traveling from Laklouk to Tannourine one passes the village of Balaa, and the "Three Bridges Chasm" (in French "Gouffre des Trois Ponts") is a five-minute journey into the valley below where one sees three natural bridges, rising one above the other and overhanging a chasm descending into Mount Lebanon. During the spring melt, a 90–100-metre (300–330 ft) cascade falls behind the three bridges and then down into the 250-metre (820 ft) chasm. A 1988 fluorescent dye test demonstrated that the water emerged at the spring of Dalleh in Mgharet al-Ghaouaghir.

Children react as a carnivorous theropod known as the Australovenator dinosaur walks through crowds along the Southbank, in London, Monday, February 18, 2013. The dinosaur is one of many that can be visited at the Erth's Dinosaur Petting Zoo, visiting from Australia, the creatures can be touched and fed at the Southbank Centre. (Photo by Kirsty Wigglesworth/AP Photo)

A woman uses protection masks to cover her face as protestors from the Million Mask March and anti lockdown protesters demonstrate, amid the coronavirus (COVID-19) outbreak in London, Britain on November 5, 2020. (Photo by Henry Nicholls/Reuters)

Dancers from The Royal Ballet perform beside the Regent's Canal in London on August 30, 2020, one of three performances they put on daily on weekends to experience performing in front of a live socially-distanced audience. (Photo by Isabel Infantes/AFP Photo)

Actresses from left Jurnee Smollett-Bell, Rosie Perez, Mary Elizabeth Winstead, Margot Robbie and Ella Jay Basco pose for a selfie photo upon arrival at the world premiere of “Birds of Prey” in London, Wednesday, January 29, 2020. (Photo by Joel C. Ryan/Invision/AP Photo)

Circus performer from the Association of Circus Proprietors on Whitehall, London, Britain, 07 July 2020. The association handed a petition to Downing Street to ask British Prime Minister Boris Johnson to allow circuses to reopen. (Photo by Will Oliver/EPA/EFE)

An image produced by the Hubble telescope of the perfectly “edge-on” galaxy, or NGC 4013, March 1, 2001. This new Hubble picture reveals, with great detail, huge clouds of dust and gas extending along, as well as far above, the galaxy's main disk. NGC 4013 is a spiral galaxy, similar to the Milky Way, lying some 55 million light-years from Earth in the direction of the constellation Ursa Major. Viewed face-on, it would look like a nearly circular pinwheel, but NGC 4013 happens to be seen edge-on from our vantage point. Even at 55 million light-years, the galaxy is larger than Hubble's field of view, and the image shows only a little more than half of the object, albeit with unprecedented detail. (Photo Courtesy of NASA/Newsmakers)

An artwork entitled “Are you still mad at me?” by John Isaacs is displayed at the Death: A Self-portrait exhibition at the Wellcome Collection on November 14, 2012 in London, England. The exhibition showcases 300 works from a unique collection by Richard Harris, a former antique print dealer from Chicago, devoted to the iconography of death. The display highlights art works, historical artifacts, anatomical illustrations and ephemera from around the world and opens on November 15, 2012 until February 24, 2013. (Photo by Peter Macdiarmid)