Jacob's Well is a perennial karstic spring in the Texas Hill Country flowing from the bed of Cypress Creek, located northwest of Wimberley, Texas. The twelve foot (four meter) diameter mouth of the spring serves as a popular swimming spot for the local land owners whose properties adjoin Cypress Creek. From the opening in the creek bed, Jacob's Well cave descends vertically for about thirty feet (ten meters), then continues downward at an angle through a series of silted chambers separated by narrow restrictions, finally reaching a depth of one hundred and twenty feet (forty meters). Until the modern era, the Trinity Aquifer-fed natural artesian spring gushed water from the mouth of the cave, with a measured flow in 1924 of one hundred and seventy gallons per second (six hundred and forty liters per second) discharging six feet (two meters) into the air. The spring is the greatest source of water recharging the Edwards Aquifer.

With a presence in nearly every city and town across Iran, the paramilitary Basij volunteer corps has an ever-increasing influence on life in the Islamic Republic. Authorities created the Basij, which means mobilization in Persian, just after the country's 1979 Islamic Republic. It is part of Iran's powerful Revolutionary Guard. Photo: In this Thursday, August 22, 2013 photo, a female member of the Basij paramilitary militia aims a rifle as a trainer looks over her shoulder in Tehran, Iran. (Photo by Ebrahim Noroozi/AP Photo)

The Moonlight Rainbow Fountain is the world's longest bridge fountain that set a Guinness World Record with nearly 10,000 LED nozzles that run along both sides that is 1,140m long, shooting out 190 tons of water per minute. Installed in September 2009 on the Banpo Bridge, former mayor of Seoul Oh Se-hoon declared that the bridge will further beautify the city and showcase Seoul's eco-friendliness, as the water is pumped directly from the river itself and continuously recycled. The bridge has 38 water pumps and 380 nozzles on either side, which draw 190 tons of water per minute from the river 20 meters below the deck, and shoots as far as 43 meters horizontally.

A man rides a horse through a bonfire as part of a ritual in honor of Saint Anthony, the patron saint of animals, in San Bartolome de Pinares, about 100 km west of Madrid, Spain on Thursday, January 16, 2014. On the eve of Saint Anthony's Day, hundreds ride their horses through the narrow cobblestone streets of the small village of San Bartolome during the “Luminarias”, a tradition that dates back 500 years and is meant to purify the animals with the smoke of the bonfires and protect them for the year to come. (Photo by Emilio Morenatti/AP Photo)

This diver almost got sucked into the mouth of a massive whale shark as it feeds on plankton. But far from staring into the jaws of death – the shark, which are the sea's largest fish, is actually vegetarian. The relieved diver escaped from the encounter unscathed and continued to enjoy the presence of the incredibly docile animals. The stunning photograph, by Mauricio Handler, was taken during a feeding session where more than 600 of the huge creatures gathered to feed on tuna spawn. (Photo by Mauricio Handler/Daily Mail/Solent)

Breitling Wingwalker Freya Paterson, from Liverpool, UK, flies above Kuwait City's iconic Water Towers with pilots David Barrell and Martyn Carrington, on March 6, 2014. The team loop and roll up to 160 mph enduring G-forces of 4-5g. Crowds are expected to line the Kuwaiti coastline to catch a glimpse of the Wingwalking team on Saturday, March 8, 2014, to mark the opening of the first dedicated boutique in the city for the prestigious watch brand. (Photo by Katsuhiko Tokunaga/Breitling)

“Richard Wilson (born May 24, 1953) is a sculptor, installation artist and musician. Wilson's work is characterised by architectural concerns with volume, illusionary spaces and auditory perception”. – Wikipedia

Photo: An installation by the artist Richard Wilson, entitled “Turning the Place Over”, is built into the condemned Cross Keys House in Moorfields as part of the Capital of Culture for 2008, on June 25, 2007 in Liverpool, England. The piece consists of an 8 metre ovoid cut from the building's facade that oscillates in three dimensions. (Photo by Jim Dyson/Getty Images)

Legend has it that the Irish warrior Fionn mac Cumhaill (Finn McCool) built the causeway to walk to Scotland to fight his Scottish counterpart Benandonner. One version of the legend tells that Fionn fell asleep before he got to Scotland. When he did not arrive, the much larger Benandonner crossed the bridge looking for him. To protect Fionn, his wife Oonagh laid a blanket over him so he could pretend that he was actually their baby son. In a variation, Fionn fled after seeing Benandonner's great bulk, and asked his wife to disguise him as the baby. In both versions, when Benandonner saw the size of the 'infant', he assumed the alleged father, Fionn, must be gigantic indeed. Therefore, Benandonner fled home in terror, ripping up the Causeway in case he was followed by Fionn.