Come with me to the spectacular and magical castle St Michael’s Mount in Cornwall, EnglandThis castle is only accessible by a tidal causeway which is revealed at low tide. At high tide it is cut off from the mainland, but still accessible by boatUsed as a set in TV drama House of the Dragon, St Michael's Mount was initially developed by a group of French monks affiliated with Mont Saint-Michel in France, who began construction on the castle in 1135. Before the monks, the island was a site of rel