While the city is small enough to explore on foot, consider purchasing a 24-hour public transit pass for more flexibility. Prices start at 4 EUR, and there are various options for multi-day passes. Taxis are also readily available.
With more time, consider taking a boat tour of the Danube River or visiting the Devin Castle, located just outside the city. If time is limited, skip Michael's Gate or the UFO Observation Deck, as they are both optional attractions. Don't forget to try traditional Slovakian dishes, such as bryndzové halušky (potato dumplings with sheep cheese).