Because tower bridges have a big base
THE Tower Bridge is in London.
Tower Bridge was built in 1894
The Eiffel is very stable because Gustave Alexandre Eiffel who built it used many well thought out structural members to support the body and shape of the iron tower!!!
It is built 5 storeys into the ground and it is shaped as a Y I supper smaart
the cements,bricks and glasses makes bridges towers strong
200 feet
with metal
London
Tower Bridge
That the bridge has to allow tall ships down the river.
There are more than 200 bridges over the Thames, including Tower Bridge and London Bridge.
A completley filled out electron level makes the atom stable