Book as many tickets in advance as you can direct from the museums, galleries etc. Recommended free walking tours: www.petersburgfreetour.com Visiting times in Summer Note that between June and September some sites, such as the Palace at the Peterhof, is only open to tourists between 10.30 and noon and 2.30 and 4.15. The grounds are open all day. Visiting the Hermitage It is recommended to buy tickets in advance: See www.hermitageshop.org/tickets/ Ticket allows entry to the Hermitage plus its other 4 branches (see above site for details). Voucher is valid for 180 days. NB. The twoday ticket must be used on consecutive days. The museum is closed on a Monday, which makes Tuesday a very busy day.