Vilnius' 14th-century, hexagonal Higher Castle can be reached by funicular and affords great views across the Old Town. Be careful climbing the final 78 precarious steps to the viewing platform. Inside there's a small museum of weapons and armoury.
Down below is the Lower Castle, which came to prominence some two centuries later, an Italian-style palace with four wings surrounding an inner courtyard. Now part of the Lithuanian National Museum, visitors here can discover more about the country's history.