If you have only one day in Vilnius, what should you see and do? One of the best aspects of Vilnius is its size: its old town is large but easy to get around at the same time. That means if you have a limited amount of time in the Lithuanian capital city, you can see a lot, on foot, in an afternoon. Visit Gediminas Castle Tower and the nearby Vilnius Cathedral to visit two of the most important sights in the old town. Also wander through the tourist district to shop for souvenirs and see the variety of architectural styles that make up Vilnius' landscape. You'll see enough of Lithuania's capital to convince you to return for a longer stay.