Located at Pavlovsk, south of the summer palace of Catherine I at Tsarskoye Selo, Pavlovsk Palace and Park is accessible to and from there by minibus. You can also take the metro (line 2, blue) from central St. Petersburg to Moskovskaya, and from there catch a minibus to Catherine's Palace or Pavlovsk.
The palace and its vast park were a gift from Catherine II (the Great) to her son Paul, who became Tsar Paul I of Russia. The palace dates from the early 1780s and is designed in the Palladian style. Together with its sumptuous interiors and beautifully landscaped surrounding park, Pavlovsk Palace has become an icon of neo-classical style. The palace was almost completely destroyed by the Germans during WW II, but has been stunningly restored.
Entrance to the park is advertised as being free, although the lady at the entrance by the Pavilion of the 3 Graces may want to sell you a ticket (150 R). Entry tickets to the palace proper (500R) are available from a booth to the left of the main entrance in the horseshoe-shaped courtyard. The palace is closed on Fridays.
In contrast to Catherine's Summer Palace at Tsarskoye Selo, Pavlovsk is relatively uncrowded. When I was there, I practically had the whole place to myself.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC