Easy to get to from Central London, you just follo...

Easy to get to from Central London, you just follow the signs from the Tower Hill tube station. There's a great guide book you can get, if you add it to your advanced ticket. This will give you detailed information about the place, whilst a free map helps you navigate.

You first begin with the medieval areas, comprising of a bed chamber and chapel. Then move on to the White Tower built by William the Conquerer. After this there's the armoury, including modern jewelled pieces and combined weapons
Finally reaching the Crown Jewels, you get to see them in all their splendor
Back outside you have giant ravens, Grenadier Guards drilling, and Traitors gate.

It'll take over two hours, to get around the place; and that's with the barracks (and other areas) closed.