personal highlights

1. Wrocław (aka Breslau): the capital of Silesia at the River Oder
2. Street art: many huge and creative artworks on buildings
3. Old Town: many beautifully restored and colorful buildings 
4. Waterfront: many picturesque bridges and lovely islands
5. Market Square: Polands most beautiful Christmas market

image sources

1. Public artwork @ Ossolineum
2. Soviet apartments @ Plac Nowy Targ
3. Aula Leopoldina @ Uniwersytet Wrocławski
4. Hotel Mercure @ Galeria Dominikańska
5. Cathedral of St. John the Baptist