Poland has much Lithuanian heritage as Lithuanian and Polish destinies have been intertwinned for centuries. Between 1569 and 1795 Poland-Lithuania was a united Commonwealth and many Lithuanian decisions used to be taken in modern-day Poland. Cracow served as the joint capital and its Wawel castle is a pantheon of Lithuanian monarchs as well as Polish.
Poland still has locations where ethnic Lithuanians are a majority (Punsk/Punskas, Sejny/Seinai area). Those are likely the only foreign places where one can feel as in Lithuania. There are Lithuanian museums, inscriptions, Christian masses and schools. Patriotism likely surpasses that in Lithuania; Columns of Gediminas are used extensively in building decor.
Armies from nations further West have passed or used to base themsleves in Poland when marching against Lithuanians. Northern Poland (Malbork castle) used to serve as a base for Teutonic Knights and the Grunewald (Žalgiris) battle has been fought not that far away. The famous pilots Darius and Girėnas died there as they flew towards Lithuania after crossing the Atlantic ocean (memorial now stands).