Britain’s natural and manmade landmarks are profuse in history and spectacular design. Hadrian’s Wall served as the northern borderline of the Roman Empire for over 300 years. Trek some of the 84-mile National Trail that runs alongside it. The Vindolanda fort just south of the wall is a fantastic start to a Romanic exploration of England’s North East. For a historical city adventure, London has an enviable number of architectural landmarks. Walk between the ages from the National Gallery in Trafalgar Square to Christopher Wren’s jewel St Paul’s Cathedral. After that, head to the open-air viewing deck of Western Europe’s tallest building, the Shard, for phenomenal views as far as the eyes can see.