Leningrad Oblast is most often visited by travelers staying in Saint Petersburg, either on a day trip or overnight to places of interest. If you are interested in Russian history or Orthodox art, you should put Staraya Ladoga at the top of your destination list, but be aware that it is difficult to get to on your own so get a tour. If castles are more your thing, Vyborg, Shlisselburg, and Ivangorod are excellent destinations, but in the case of the latter, be sure to get all your paperwork in order because the Estonian side of the city is more interesting and accommodating. Finally, if Saint Petersburg and its suburbs have not tired you out of seeing palaces, Gatchina's palace is quite impressive.