It is possible to enter the Citadel, but only on guided tours as a part of National Heritage. This runs on Tuesdays, May to September from 2.30pm (Costs £3). At other times it is not possible to enter it as it is still in use by the Military (The 29 Commando Royal Artillery Regiment), but it is still worth a visit. There are numerous monuments surrounding it, attesting to the valour of the armed forces of Great Britain in WWII and other conflicts. By walking past it you go past some of the best spots for seeing the view over the Ocean as well.
I recommend a vist to the Main Gate on Hoe Road, as this is a piece of stunning piece of architechture. Just remember that it is still in use though...
A very historical building, the details of which are outlined in the website below.


