Canary Wharf

The Canary Wharf area of London was home to Torchwood Tower, located at One Canada Square. (DW: Army of Ghosts/Doomsday)

Shortly after the change-over from 1999 to 2000, due to Ashley Chapel's use of the Millenium Codex, a triangular area of London, with One Canada Place at its epicenter, transformed into a place called the Great Kingdom. (MA: Millennial Rites)

A major battle between Daleks and Cybermen took place there. (DW: Doomsday)

Alternate timelines
The Doctor's TARDIS materialized at the Canary Wharf stop of the London Underground in an alternative version of 2006, in which London had suffered major destruction. (PDA: The Time Travellers)