located_in_the_administrative_territorial_entity dinorwig
Yr Wyddfa commonly known as Snowdon in English , is the highest ___MASK13___ in Wales , at an elevation ___MASK83___ above sea level , and the highest point in the British Isles south ___MASK83___ the Scottish Highlands . It is located in Snowdonia National Park (") in ___MASK80___ , and has been described as " probably the busiest ___MASK13___ in Britain ". It is designated as a national nature reserve for its rare flora and fauna . Gnaeus Julius Agricola ( 13 June 40  23 August 93 ) was a Gallo - Roman general responsible for much ___MASK83___ the Roman conquest ___MASK83___ Britain . Written by his son - in - law Tacitus , the " De vita et moribus Iulii Agricolae " is the primary source for most ___MASK83___ what is known about him , along with detailed archaeological evidence from ___MASK1___ Britain . The Silures were a powerful and warlike tribe or tribal confederation ___MASK83___ ancient Britain , occupying what is now south east Wales and perhaps some adjoining areas . They were bordered to the north by the Ordovices ; to the east by the Dobunni ; and to the west by the Demetae . The Ordovices were one ___MASK83___ the Celtic tribes living in Great Britain before the Roman invasion . Their tribal lands were located in present - day North Wales and England between the Silures to the south and the Deceangli to the north - east . The Ordovices were conquered by the Roman governor Gnaeus Julius Agricola in the campaign ___MASK83___ AD 77  78 . A lake is an area ___MASK83___ variable size filled with water , localized in a basin , that is surrounded by land , apart from any river or other outlet that serves to feed or drain the lake . ___MASK33___ lie on land and are not part ___MASK83___ the ocean , and therefore are distinct from lagoons , and are also larger and deeper than ponds , though there are no official or scientific definitions . ___MASK33___ can be contrasted with rivers or streams , which are usually flowing . Most ___MASK33___ are fed and drained by rivers and streams . Climbing is the activity ___MASK83___ using one ' s hands , feet , or any other part ___MASK83___ the body to ascend a steep object . It is done recreationally , competitively , in trades that rely on it , and in emergency rescue and military operations . It is done indoors and out , on natural and manmade structures . Llyn Peris is a lake in ___MASK99___ , Wales , approximately 1 . 8 km long and situated close to the villages ___MASK83___ Llanberis and Nant Peris . The lake was formed glacially and is an example ___MASK83___ a moraine - dammed lake . Llyn Peris is named after Saint Peris , an early Christian saint ___MASK83___ whom little is known . The lake is flanked on one side by the mountain Elidir Fawr and the former slate quarry ___MASK83___ Dinorwig . Above the opposite bank are the hills ___MASK83___ Derlwyn and Clogwyn Mawr and a rock formation known as the Lady ___MASK83___ Snowdon , due to its resemblance to a human face . The ruins ___MASK83___ Dolbadarn Castle are also located on a mound above the lake . ___MASK13___ biking is the sport ___MASK83___ riding bicycles off - road , often over rough terrain , using specially designed mountain bikes . ___MASK13___ bikes share similarities with other bikes , but incorporate features designed to enhance durability and performance in rough terrain . The term mountaineering describes the sport ___MASK83___ mountain climbing , including ski mountaineering . Hiking in the mountains can also be a simple form ___MASK83___ mountaineering when it involves scrambling , or short stretches ___MASK83___ the more basic grades ___MASK83___ rock climbing , as well as crossing glaciers . ___MASK61___ is a country that is part ___MASK83___ the United Kingdom and the island ___MASK83___ Great Britain . It is bordered by England to the east , the Irish Sea to the north and west , and the Bristol Channel to the south . It had a population in 2011 ___MASK83___ 3 , 063 , 456 and has a total area ___MASK83___ . ___MASK61___ has over ___MASK83___ coastline and is largely mountainous , with its higher peaks in the north and central areas , including Snowdon , its highest summit . The country lies within the north temperate zone and has a changeable , maritime climate . Llanberis is a village in ___MASK80___ , northwest Wales , on the southern bank of the lake Llyn Padarn and at the foot of Snowdon , the highest mountain in Wales . It is a popular centre for outdoor activities in Snowdonia , including walking , mountaineering , climbing , mountain biking and pony trekking as well as water sports such as Scuba Diving . The international fell race known as the Snowdon Race ( Welsh : " Ras Yr Wyddfa ") to the summit of Snowdon begins in the village . ___MASK80___ is an area in north - west Wales , named after the old Kingdom of ___MASK80___ . As a local government area , it is the second biggest in Wales in terms of geographical area and also one of the most sparsely populated . A majority of the population are Welsh - speaking . The name ___MASK80___ is also used for a preserved county , covering the two local government areas of ___MASK80___ and the Isle of Anglesey . Culturally and historically , the name can also be used for most of North Wales ( for instance , the area covered by the ___MASK80___ Constabulary ), roughly corresponding to the territory of the Kingdom of ___MASK80___ at its greatest extent . The current area is 2 , 548 square km ( 983 . 78 sq miles , slightly smaller than Luxembourg ) with a population as measured in the 2011 Census of 121 , 874 . The Deceangli or Deceangi ( Welsh : Tegeingl ) were one ___MASK83___ the Celtic tribes living in Britain , prior to the Roman invasion ___MASK83___ the island . The tribe lived mainly in what is now north - east Wales , though it is uncertain whether their territory covered only the modern counties ___MASK83___ Flintshire , Denbighshire and part ___MASK83___ Cheshire in what is now present day England or whether it extended further west . The tribe occupied an area between the Clwyd and Dee rivers . They lived in hill forts running in a chain through the Clwydian Range and their tribal capital was Canovium . Llyn Padarn is a glacially formed lake in ___MASK99___ , ___MASK80___ , north Wales , and is an example of a moraine dammed lake . The lake is approximately long ( about 240 acres ) and at its deepest point is deep , and is one of the largest natural lakes in Wales . At its south - eastern end it is linked to the neighbouring Llyn Peris ( which forms the lower reservoir of the Dinorwig power station ). The busy village of Llanberis lies on the southern banks of the lake . Constrained Energy Lapped Transform ( CELT ) is an open , royalty - free lossy audio compression format and a free software codec with especially low algorithmic delay for use in low - latency audio communication . The algorithms are openly documented and may be used free ___MASK83___ software patent restrictions . Development ___MASK83___ the format was maintained by the Xiph . Org Foundation ( as part ___MASK83___ the Ogg codec family ) and later coordinated by the Opus working group ___MASK83___ the Internet Engineering Task Force ( IETF ). ___MASK99___ is a mountainous region in north Wales and a national park ___MASK83___ in area . It was the first to be designated ___MASK83___ the three national parks in Wales , in 1951 . Walking ( also known as ambulation ) is one ___MASK83___ the main gaits ___MASK83___ locomotion among legged animals , and is typically slower than running and other gaits . Walking is defined by an ' inverted pendulum ' gait in which the body vaults over the stiff limb or limbs with each step . This applies regardless ___MASK83___ the number ___MASK83___ limbs - even arthropods , with six , eight or more limbs , walk . The Dinorwig Power Station is a pumped - storage hydroelectric scheme , near Dinorwig , Llanberis in ___MASK99___ national park in ___MASK80___ , north Wales . Its purpose is not to help meet peak loads but as a " Short Term Operating Reserve ", to provide a fast response to short - term rapid changes in power demand . Dinorwig is a small village located high above Llyn Padarn , near Llanberis , in ___MASK61___ . It is thought that it was part ___MASK83___ the territory ___MASK83___ the Ordovices tribe , and that ' Dinorwig ' means `` Fort ___MASK83___ the Ordovices '' . The village has a long history ___MASK83___ slate quarrying . The Romans used local slate for the construction ___MASK83___ Segontium , and slates from the valley were used in the construction ___MASK83___ Caernarfon Castle . The main local quarry was the Dinorwic Quarry , which was worked from the late 1770s until 1969 . After the First World War , cheaper alternative roofing materials became available and production at the quarry declined . This led to a decline in the fortune ___MASK83___ the village itself and many moved away to nearby towns such as Bangor and Caernarfon . Today , the village shares its name with a pumped storage hydroelectric power station , Dinorwig power station . The village is also the location ___MASK83___ the Blue Peris Mountain Centre , a residential outdoor activities centre operated by Bedford Borough Council and Central Bedfordshire Council . Part ___MASK83___ the film Willow was shot in the disused Dinorwig Quarry , in June 1987 . The village ' s population is approximately 200 . Scuba diving is a mode ___MASK83___ underwater diving in which the scuba diver uses a self - contained underwater breathing apparatus ( scuba ) which is completely independent ___MASK83___ surface supply , to breathe underwater . Scuba provides the diver with the advantages ___MASK83___ mobility and horizontal range far beyond the reach ___MASK83___ an umbilical hose attached to surface - supplied diving equipment ( SSDE ). Scuba divers engaged in armed forces covert operations may be referred to as frogmen , combat divers or attack swimmers .