London walks and walking tours.
London has the oldest comprehensive transport system, of any city in the world. As a result it needs continual maintenance to repair bridges, roads and tunnels which are 2-300 years old, so it's not as spanking new as you'll find in younger cities. Despite these difficulties and endless refurbishment programmes, it also has the largest transport system and this section of the site is aimed at persuading you to leave it alone - for at least some of the time.
Travelling by Tube can move you around the city rapidly, but will also contribute to you frequently losing your bearings. If you follow a few of these walks you can take in many of the sites, but more importantly, can understand how those different regions and districts are connected.