BOLESTRASZYCE In the area of the old estate of the Michałowski family in Bolestraszyce there is the largest arboretum in south-eastern Poland. Taking a stroll along the paths and ponds visitors will see thousands of plant species (often very rare) from all over the world. In the preserved manor house and the surrounding park the eminent artist Piotr Michałowski created his works. Near the arboretum there is an important feature of the Fortress of Przemysl – the ruins of the armoured fort XIII "San Rideau" from 1892-1896.