Planet (Castrovalva)
From Tardis Wiki, the free Doctor Who reference
As Nyssa explained to the Fifth Doctor based on the TARDIS data bank, the city of Castrovalva was on a "small planet of the Phylox series", in Andromeda. The planet had running water and dense forests. (TV: Castrovalva [+]Loading...["Castrovalva (TV story)"])