The name Buda Castle covers more than a castle or the Royal Palace in the capital city; it extends to the historical quarter full of sites (Trinity Square, Matthias Church, Fishermen's Bastion, Mary Magdalene Tower, Castle District, Royal Palace, Cave system).

The Castle area consists of two distinct part: the Old Town (Var) and the Royal Palace (Budavari palota). On bright spring days people invite friends for a "walk in the Castle", i.e. to wander around the Castle Hill quarter. The most exiting way of getting to the Castle is by taking the Funicular, a little cable car up the Castle Hill.