Snowy day in MullaghA walking tour provides a great insight into the history, culture and traditions of the capital.  Climb Castlehill to explore the mighty castle, a fortress and former royal residence, now a major part of the Old and New Towns of Edinburgh UNESCO World Heritage Site. Scotland’s crown jewels are among the national treasures on display within the castle walls. Known as the ‘defender of the nation’, Edinburgh Castle remains an active military base.