Southwark is London's most historic borough, comprising five districts. Its most popular attractions are located in the district of Bankside and Borough, bordering the south bank of the Thames between Blackfriars Bridge and London Bridge. These include the landmark Tate Modern building, linking to St Paul's Cathedral via the Millennium footbridge, showcasing the world's finest contemporary art; the Bankside Gallery, which exhibits watercolours and original prints and Shakespeare's Globe Theatre. Nearby is the Rose Theatre, the only Elizabethan theatre site with remains completely available for modern exploration. These are tucked into the basement of an office block, submerged beneath a protective pool of water and provides an insight into Shakespeare's and Marlowe's London.