If you go down Earls Court Road in London on Google maps, you will see a familiar blue police telephone box. (Click here to link to the street)
Click on the double arrow pointing to the telephone box and you can enter the tardis!
You can get up close to the central control console and walk up the steps to a viewing platform around the side. Unfortunately there are no rooms to explore, but its fun to be inside! I think this is the version David Tennant rode inside, but I could be wrong.
Enjoy your ride inside the tardis.