William Shakespeare Memorial at Southwark Cathedral. The stained glass shows characters from Shakespeare's work, while below he is reclining with a quill. Southwark Cathedral is the oldest cathedral church building in London.
The Tate Modern is one of the most intriguing and interesting museums in the world. It is a must see, both for its setting (along the Thames, housed in a huge defunct power plant) and its installations and stationary art collections.