Dr Jonathan Foyle, architectural historian and novice climber, scales Britain's most iconic structures, to reveal the buildings' secrets.

Video Providers
Jonathan's journey begins in the North East of England at Durham Cathedral, one of the finest surviving examples of Norman architecture in the UK.
Choose a quality and server to start downloading.
The next step of Jonathan's journey takes him to Caernarfon castle, built in 1283 and one of the most magnificent examples of medieval castle building in Britain.