Trieste's hilltop fortification is ironically overshadowed by its brother down on the seashore (Miramare), but the 15th century Castle of San Guisto is also worth a look, with several parts open to the public including a museum with suits of armour and weapons (for whoever's fancy this may tickle). We personally appreciated the magnificent panoramic view it had to offer from its walls; the castle and fortifications having been built and extended progressively over two centuries. In fact, the castle itself was erected on the strategically formidable site of previous forts. See the Lapidario Tergestino for statues and architectural artefacts.