The Royal Guard Museum is not far from the British Parliament, you can walk there. The Royal Guard is nominally the queen's bodyguard. Many people take pictures. The cavalry changing of the guard ceremony is a major feature. You can check the time in advance and watch the ceremony. Normally, it is very ordinary, just an ordinary British building.
The Guards Museum is a military museum in central London located in the Wellington Barracks. The museum displays the history of the Corps from the 17th century to the present. There are a lot of uniforms, weapons and crafts, and there is also a glass wall where you can see the soldiers taking care of the horses
The museum is worth visiting, simple and solemn, not many tourists