Because it has a unique design.
There are 214 bridges which cross the river Thames so it would be difficult to name them all here. However, some of the best known bridges in London are Tower, London, Southwark, Lambeth, Vauxhall, Albert, Chelsea, Putney, Richmond, Kingston
Tower Bridge is located in London and crosses the river Thames from Tower Hamlets on the north bank to Southwark on the south bank. It lies adjacent to the Tower of London and is the only bridge in London that can open to allow boats to pass underneath it. Because it is so well known throughout the world, it is sometimes referred to incorrectly as London Bridge - which is the next bridge upstream.
Tower Bridge is the only bridge across the River Thames in London which can be raised to allow tall vessels to pass underneath it.
Well...a tower is a building, and a bridge helps you get across items. I know...it's hard to understand.
The Tower Bridge is a combined bascule and suspension bridge.
Tower Bridge is east of London Bridge.
The Brooklyn Bridge is an important bridge in an important city; it is perfectly logical for it to become well known.
Tower Bridge is a combined bascule and suspension bridge.
Tower Bridge is adjacent to the Tower of London on its southeast corner.
a challenge for the tower bridge was getting all the right stuff under one budget and how long the bridge took to build
The tower bridge is located on the river thames
Tower Bridge was created in 1894.