Buckingham Palace is one of the tourist attraction because of the guard in front of it ....there a certain time the guard will change to another duty...so if you're lucky you'll see the marching...
How To Get There:
By train: London Victoria. (National Rail Enquiries Service 08457 484950 (UK)).
By underground: Victoria, Green Park and Hyde Park Corner.
By bus: Numbers 11, 211, 239, C1 and C10 stop on Buckingham Palace Road.