Visitors ascend the Marble Arch Mound, a new temporary attraction, next to Marble Arch in central London on July 28. (Tolga Akmen/AFP/Getty Images) By Jennifer Hassan.

Marble Arch, has become marooned at the junctions of Oxford Street, Park Lane and Edgware Road in central London, and can only be reached by subway. Transport for London (TfL) is looking at moving it ...