Panorama of Gran Sasso d'Italia. Monti della Laga is seen in the background.Monte Prena in the chain of Gran Sasso.Corno Grande in the chain of Gran Sasso.
The three main summits of the Gran Sasso areCorno Grande, which at 2,912 metres (9,554 feet) is the highest peak in the Apennines, nearbyCorno Piccolo, andPizzo d'Intermesoli, which is separated from the other two peaks by Val Maone, a deep valley. Corno Grande and Corno Piccolo's ash coloration come from their limestone and dolomite composition. The peaks are snow-covered for much of the year though the snow cover appears to be less each decade. Corno Piccolo is referred to as, "The Sleeping Giant". This is due to the appearance of a profile of a reclined face. This view of Corno Piccolo is evident when viewing the mountain from Pietracamela, a small town nearPrati di Tivo, on the north side of the mountain. Corno Grande and Corno Piccolo with their rough vertical walls provide serious rock climbers with challenges.
Situated below the peak of the Corno Grande is theCalderone glacier, although deglaciation has significantly reduced the glacier's size. Glaciologists now question whether the glacier will survive past 2030.[citation needed]
The mid- to lower slopes of the Gran Sasso are grazed in spring, summer and autumn by large flocks of sheep guarded byMaremmano-Abruzzese sheepdogs as well as herds of cattle and semi-wild horses. The pastures are covered with field grasses and meadowland wildflowers. The park is also the habitat for diverse wildlife from rare species such as theApennine wolf, theMarsican bear,European wildcat and theAbruzzo chamois (Rupicapra pyrenaica ornata), a variety of chamois at the very edge of extinction but now making a comeback in the park through a joint effort by WWF Italia and the park administration. Other species of wildlife include wildboar,foxes, grass snakes such asOrsini's viper, and a wide variety of bird life includinggolden eagles,peregrine falcons,goshawks,ortolan buntings,rock sparrows,crested larks,red-backed shrikes and downy pipits.
At the northern base of Corno Piccolo is Prati di Tivo, a ski village. To the east of Corno Grande and Corno Piccolo liesCampo Imperatore, a 27-kilometre-long (17-mile) and 8-kilometre-wide (5.0-mile) high plain orplateau at about 2,000 metres (6,600 feet) height. Campo Imperatore is home to Italy's oldest continuously operating commercial ski area (connected to Fonte Cerreto via cable car).
Hotel Campo Imperatore in Gran Sasso wasBenito Mussolini's prison until his freeing in September 1943 by Nazi commandos in theGran Sasso raid. The plateau is also the site of the Campo Imperatore station of theRome Observatory, from which theCampo Imperatore Near-Earth Object Survey and other astronomical studies are carried out. At the southern edge of Campo Imperatore and within the bounds of the national park are three medieval hill towns once ruled by theMedicis; Calascio, which sits before the ancient fortress ruin of Rocca di Calascio, Santo Stefano di Sessanio, and Castel Del Monte.
In 2005, a 2,424-metre-high (7,953 ft) peak previously named "The Gendarme" was renamed "John Paul II Peak" on what would have beenPope John Paul II's 85th birthday.[1] He had visited the Gran Sasso many times, saying it reminded him of the mountains of his native Poland.
In 1984, a 10-kilometre (6.2-mile) two-lane highway tunnel carrying theA24 motorway, theTraforo del Gran Sasso, was bored through the Gran Sasso Massif. In 1995, a second parallel tunnel was completed. Construction of the tunnel included an undergroundparticle physics laboratory at Assergi, theLaboratori Nazionali del Gran Sasso orGran Sasso National Laboratory (LNGS). The first large experiments there started in 1989.
The laboratory is composed of three large underground chambers, sometimes referred to collectively as the third tunnel, and lies beneath 1,400 metres (4,600 feet) of rock. Construction of the laboratory and second tunnel faced opposition from Italian and international environmental groups includingPro-Natura International,LIPU andClub Alpino Italiano, as well as theWorld Wide Fund for Nature,Greenpeace, andFriends of the Earth. Environmentalists noted that the nuclear physics laboratory would lie on or near two major and highly active seismic faults, that construction of the tunnels would interfere with a majoraquifer, and thatconstruction waste would degrade an environmentally sensitive and significant area. Many[who?] credit the opposition created by the tunnel and laboratory construction with galvanizing the Italianenvironmental movement and leading to the creation of theGran Sasso and Monti della Laga National Park in 1991. In recent years, the laboratory has itself begun promoting preservation of the Gran Sasso environment.
Because of its low background radiation, the underground laboratory is used for experiments in particle and nuclear physics, including the study ofneutrinos, high-energycosmic rays,dark matter,nuclear decay, as well as the study ofgeology, andbiology. The laboratory employs over 700 scientists from twenty countries. The LNGS was the destination of the neutrinos involved in thefaster-than-light neutrino anomaly publicly announced in September 2011 and retracted in July 2012. In the summer of 2014 the facility was instrumental in confirming previous theories about the Sun's main source of energy, when proton-to-proton fusion-produced neutrinos[2] were detected and measured, virtually at the Sun's core.
The Gran Sasso is located in theGran Sasso and Monti della Laga National Park. Running through this nature preserve is a portion of the Italian State Highway 80 (SS80), known as the Grand Highway of the Gran Sasso and Monti della Laga National Park ("Strada maestra del Parco").
While frequented by skiers in winter, and mountain climbers and hikers in other seasons, the Gran Sasso is remarkably free of tourists despite its proximity toRome and the events of theGran Sasso raid that took place there in 1943. This is especially true in summer with most Italians preferring beach vacations and foreign visitors are more likely to visit the mountains of northern Italy.
Pope John Paul II loved to secretly ski at Gran Sasso where he would retire often and pray at the church of San Pietro della Ienca. When he died CardinalStanislaw Dziwisz, gave the localAbruzzo community some of the late pontiff's blood as a token of the love he had felt for the mountainous area.[3]