The Explosion! museum is situated in Gosport, Hampshire, in the 18th century buildings of the Royal Navy’s former armaments depot. The Museum is one if the Portsmouth Historic Dockyard group of attractions.
The displays include historic uses of the site, plus naval weapons of all sizes. The largest complete gun assemblies with mountings are around 4 and a half inch, larger guns being represented by 6″ barrels and a 15″ breech. Some gun mountings can be seen in the photo above. There are also missiles, mines and torpedoes of various ages, including a nuclear bomb. If you like weaponry, this is for you. There are over a dozen display halls.
The Museum has a large number of modern audio-visual displays for interpretation and further information, but I found several that were not working properly.
My tour took around 3 hours, and I could have spent longer.
Access: The site can be reached by water-bus from the Historic Dockyard at Portsmouth, or by road from Gosport. The water-bus is infrequent; however the alternative access by road passes through a long built-up area and is liable to be very slow on a weekday.