BATH, UNITED KINGDOM - NOVEMBER 13:  Bath and North East Somerset Council employee Phil Grant brushes the last of the algae and sludge from the original Roman lead lined floor of the Great Bath as it is drained of natural thermae spa water as part of a cleaning operation, at the historic Roman Baths on November 13 2008 in Bath, England. Sited below modern street level the Roman Baths contains one of the best examples of a preserved Roman bath complex in Europe. Previous cleaning operations have revealed all manners of modern day debris including traffic cones, shopping trolleys and even a moped. Accidently re-discovered in the 1800s, the steps and lead lining of the Great Bath are over 2000 years old and are visited by over one million tourists a year. Getty Images logo Getty Images 12 months ago

BATH, UNITED KINGDOM - NOVEMBER 13: Bath and North East Somerset Council employee Phil Grant brushes the last of the algae and sludge from the original Roman lead lined floor of the Great Bath as it is drained of natural thermae spa water as part of a cleaning operation, at the historic Roman Baths on November 13 2008 in Bath, England. Sited below modern street level the Roman Baths contains one of the best examples of a preserved Roman bath complex in Europe. Previous cleaning operations have revealed all manners of modern day debris including traffic cones, shopping trolleys and even a moped. Accidently re-discovered in the 1800s, the steps and lead lining of the Great Bath are over 2000 years old and are visited by over one million tourists a year.