The Horse Guards at St. James
Across from St James Park sits the Horse Guards, home to the Household Cavalry and London District Army commands, it was originally the formal entrance to St James Palace and only a monarch is allowed to drive through its central archway.
For those of you who celebrated the royal wedding, this was the narrow archway under which passed Prince William, his future bride and the Queen before and after the wedding ceremony at Westminster Abbey.
Horse Guards is normally guarded by troopers of the Household Cavalry, both mounted and on foot; visiting the horses is popular with tourists. Two mounted cavalry troopers are posted outside daily from 10 am to 4 pm, and are relieved every hour. Also two Troopers are posted from 10 am till 8 pm and are relieved every 2 hours. There is the changing of the guard at 11am everyday but on Sundays is brought forward to 10am.