The Naval and Submarine Museum in Cartagena (Spain) is good as well. Free, at least when we went 2 years ago, well laid out with information in English as well as Spanish. The submarine section has models from the inception of the Spanish Submarine Service to present day and numerous artefacts.

Decent toilets as well and all positioned just by the harbour at the foot of the main shopping street and close to the cruise terminal. Adjacent is the naval base just round the corner.

Cartagena was one of the main bases for the anti-Franco faction in the 1930’s Civil War.

Paul.

Yes, we thought Cartagena was one of those vastly under-estimated destinations. Our cruise ship only went there because there had been a cock-up with going to Cagliari when Cunard discovered the proposed berth was too shallow for the limits of the ship! >>

The town centre is nice and the cafes very, very reasonable and there is lots of Civil War history with the citadel and underground facilities etc. Tom Sheridan's Port Guide is/was far more useful than any official guide. He does guides for lots of other port style=”color: rgb(34, 34, 34); font-family: Arial, sans-serif; font-size: 9pt;”>>destinations worldwide and you can take them with you on your phone.

https://www.tomsportguides.com/uploads/5/8/5/4/58547429/cartagena-spain-08-20-2013.pdf

Paul F.