Living within three or four miles of the iconic Tower Bridge gets you into the tourist exhibition on the walkway 140ft above the Thames for just £1.

East London Advertiser: Tower Bridge used every year for the London Marathon... seen here are Mo Farah, Daniel Wanjiru and Callum Hawkins in last month's Big Half manarathon. Picture: Ian WaltonTower Bridge used every year for the London Marathon... seen here are Mo Farah, Daniel Wanjiru and Callum Hawkins in last month's Big Half manarathon. Picture: Ian Walton (Image: ©The Vitality Big Half)

That saves £11 an adult or £5 for under-15s if you live anywhere in the boroughs of Tower Hamlets or Southwark or in the City.

It is part of the newly-launched Tower Bridge ‘community’ ticket for residents and families.

All they need is proof of address and identity — and the most famous bridge in the world is theirs, valid up to March 31 next year.

East London Advertiser: Roadworks on Tower Bridge soon after it was opened in 1894. Picture source: City of London ArchivesRoadworks on Tower Bridge soon after it was opened in 1894. Picture source: City of London Archives (Image: City of London Archives)

The permanent exhibition in the walkways with its glass floor panels looking down on the Thames drew in 807,000 tourists last year.

It outstripped the Museum of London by a cool 130,000, though not as popular as its Tower of London neighbour with 2,843,000.

But then, The Tower has been there 1,000 years while the 800ft long Tower Bridge has only been around since 1894. Tower Bridge was the largest bascule and suspension bridge ever built when it was completed to deal with commercial development as London expanded eastward in the 19th century.

East London Advertiser: Iconic Tower Bridge on a foggy day in London Town. Picture: Joe LordIconic Tower Bridge on a foggy day in London Town. Picture: Joe Lord (Image: Archant)

It has two Gothic towers build in plinths on the river bed that clad its steel structure which are connected by two walkways 140ft above the Thames. The plinths house the bascule counter-weights that lift the bridge deck to let shipping pass through.

The towers were covered in Cornish granite and Portland stone to protect the steel structure from London’s foggy weather and in a style to blend with the Tower of London. The Prince of Wales officially opened Tower Bridge on June 30, 1894.