Tower Bridge

Tube : Tower Hill
Borough : Tower Hamlets


http://www.towerbridge.org.uk/TBE/EN/


You can also see the bridge pretty close cruising on the Thames.

St Paul's cathedral

The Chapterhouse, St Paul's Churchyard EC4M 8AD

Tube : St Paul
Borough : City
                          
http://www.stpauls.co.uk/
http://en.wikipedia.org/wiki/St_Paul's_Cathedral