Jonathan Meades explores some of the most exciting buildings and sites around Britain. The title refers to an architectural series Meades made for BBC Two in the 1990s called Abroad in Britain. He visits an imposing English Gothic building with the largest cloisters in Britain, one of Scotland's greatest landmarks,, a magnificent mansion containing some surprising technological innovations, the largest industrial site in the world 200 years ago and the exuberant seaside home that George IV built when he was Prince Regent.