ロンドン塔:
a Londoner
a Londoner
a visit to London [the Eiffel Tower]
Lord Mayor.
the central part of London
the capital of Great Britain, named London
Did you visit the Tower of London?
ロンドンで[に].
That's the Tower of London you (can) see over there ahead of us.
ロンドン・アイ:
London and its vicinities