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Castle Rock, Edinburgh
(4.7/5 based on 120 reviews on the web)
Castle Rock is a volcanic plug in the middle of Edinburgh upon which Edinburgh Castle sits. The rock is estimated to have formed some 350 million years ago during the early Carboniferous period. It is the remains of a volcanic pipe which cut through the surrounding sedimentary rock, before cooling to form very hard dolerite, a coarser-grained equivalent of basalt. Subsequent glacial erosion was resisted more by the dolerite, which protected the softer rock to the east, leaving a crag and tail formation.The summit of the castle rock is 130m above sea level, with rocky cliffs to the south, west and north, rearing up to 80m from the surrounding landscape. This means that the only readily accessible route to the castle lies to the east, where the ridge slopes more gently. The defensive advantage of such a site is clear, but the geology of the rock also presents difficulties, since basalt is an extremely poor aquifer. Providing water to the Upper Ward of the castle was problematic, and despite the sinking of a 28m deep well, the water supply often ran out during drought or siege, for example during the Lang Siege of 1573.
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Reviews
TripAdvisor
  • Nicely located in the middle of the city you should visit it. The best place to visit in Edinburgh. Cannot miss it. 
  • The Castle Hill is a up 130 metre high mountain of volcanic origin in the middle of the city centre of Edinburgh, the world-famous Edinburgh Castle was built on the rock. No matter, where you go through the city centre, looking again and again on the mighty rock with the fantastic Castle. Of course, you can visit also the Castle, what is really worth. We have delighted us again and again during our stay in Edinburgh at the sight.
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  • The medieval builders of the original Edinburgh Castle picked a prime location. The Rock is easily seen from several other sites in the city. The view of the city from the Rock is equally prime. Yes, ...  more »