The Stibbert museum is what happens when a rich, half-English Victorian with a private army's worth of armour decides to stage it like theatre. Frederick Stibbert filled his villa on the hill of Montughi with arms and armour from Europe, Japan and the Ottoman world, then arranged the best of it as a Cavalcade — a column of mounted knights riding at you down a great hall. It is gloriously, knowingly over the top.
About three kilometres including the climb, best in the afternoon. From the T2 tram, walk up Via Stibbert — twenty quiet minutes, the city falling away. Inside, the Cavalcade Hall is the showpiece, the Japanese armoury close behind; the house itself is sixty crowded rooms seen by guided visit, so check the slots before you set out.
Then the grounds. Stibbert laid them out as a romantic English park — winding paths, a pond, a small mock-Egyptian temple to stumble on. Wander, get briefly lost, then take a different lane down through Montughi's villas to the tram. A genuinely odd half-day, which is the recommendation.