The Vrtba Garden is behind an unmarked door on a busy Malá Strana street, and it goes up rather than along. Three terraces rise on curved retaining walls, linked by stairs that turn back on themselves, so the view changes at every landing and the city arrives in pieces rather than all at once. Gods stand along the balustrades, an oval pool at the bottom holds a putto riding a sea creature, and shells and water deities are worked into the upper wall.
The problem was the ground. Jan Josef, Count of Vrtba and Highest Burgrave of Prague Castle, owned a steep, awkward slice of the Petřín slope behind his palace, and between about 1715 and 1720 he had it turned into this. Nothing was flattened; the difficulty was used. What he paid for was a composition rather than a park, meant to be looked at whole from below and only then climbed through. Take it in that order. Stop at the bottom of the steps and look up before you start, because from the first landing on you are inside the drawing rather than in front of it.