If you (somewhat generously) count The Millennium Mile all the way from London Eye at Westminster Bridge in the west, to Tower Bridge in the east, then there is more to see and do than you normally get during a tourist weekend. However, it is a bit of a challenging walk as it switches to appearance, accessibility and attraction. The easiest are the parties at both ends, while the middle (about at Southwark Bridge) is a bit messy and not as easy to walk (well, easy to walk but not in the classic riverbank way). There are clearly some transport routes as well, but on the whole a very pleasant and exciting experience that has undergone a lot of upgrading in recent years.