Start your day with a visit to the Buda Castle, a magnificent palace complex dating back to the 14th century and a UNESCO World Heritage Site. The site includes the Buda Castle Labyrinth, a maze of interconnecting caves filled with history and legends. Next, visit the Fisherman's Bastion, a fairy-tale-like neo-Gothic terrace overlooking the Danube River. Here, you can also visit the Matthias Church with its intricate and colourful roof tiles and rich interior. End the day at the Citadella, a fortified hilltop fortress with panoramic views of the city.
Start the day at the Great Market Hall, a bustling indoor market where you can sample traditional Hungarian food and buy souvenirs. The Andrássy Avenue is the city's most glamorous boulevard, lined with grand buildings and upscale boutiques, and leads to Heroes' Square, a tribute to Hungary's most celebrated historical figures. Here, you can also visit the impressive Museum of Fine Arts and the Kunsthalle modern art museum. End the day with a relaxing soak in one of Budapest's thermal baths, such as the iconic Szechenyi Thermal Bath.
If you have more time, consider taking a night-time river cruise on the Danube, visiting the stunning St. Stephen's Basilica, or strolling down the trendy Király Street with its unique shops and bars. If you have less time, you could skip the Buda Castle Labyrinth or Kunsthalle, or combine Andrássy Avenue with a visit to the Jewish Quarter and its iconic ruin bars.