Spread atop the Castle Hill is the Castle District, one of Budapest's landmarks and part of the UNESCO World Heritage. Entering through the gate called Bécsi kapu it's as if you were immediately thrown back to the past. The time-honoured walls embrace treasures like the 7 bastions of the Fishermen's Bastion, Mathias' Church with its colourful roof tiles, the Hungarian National Archives or the Hungarian President's residence, the Sándor Palace.
In between the sights, dedicate some time to refill you energy with the help of Ruszwurm Confectionery's mille feuille or a glass of Villány red wine at Baltazár Budapest. Once recharged, check out the paintings by renown Hungarian painters at Hungarian National Gallery or the uniforms and weapons exhibited at Museum of Military History.
To quench your hunger, you can choose from a row of prestigious restaurants, like Alabárdos, Vár: a Speiz, 21 Étterem and Pierrot Café Restaurant. Do not forget to glance down from above the castle walls to the awesome Várkert Bazaar and the panorama of Pest.
Nighttime walks are also highly recommended.