Need to see in Wroclaw - Wikipedia
Ostrów Tumski is the oldest part of the city of Wrocław. It was formerly an island (ostrów in Old Polish) known as the Cathedral Island between the branches of the Oder River, featuring the Wrocław Cathedral built originally in the mid 10th century.
The 13th century Main Market Square (Rynek) prominently displays the Old Town Hall. In the north-west corner of the market square there is the St. Elisabeth's Church (Bazylika Św. Elżbiety) with its 91,46 m tower, which has an observation deck (75 m). North of the church are the Shambles with Monument of Remembrance of Animals for Slaughter (pl). Salt Square (now a flower market) is located at the south-western corner of the market square. Close to the square, between Szewska and Łaciarska streets, there is the St. Mary Magdalene Church (Kościół Św. Marii Magdaleny) established in the 13th century.
Źródło: https://en.wikipedia.org/wiki/Wroc%C5%82aw
Wroclaw - the basics
Wrocław ("?vr?tsw?f"; Polish pronunciation: "?vr?t?swaf" ( listen), German: Breslau, "b??s?la?"; Latin: Vratislavia) is the largest city in western Poland. It is on the River Oder in the Silesian Lowlands of Central Europe, roughly 350 kilometres (220 mi) from the Baltic Sea to the north and 40 kilometres (25 mi) from the Sudeten Mountains to the south. Wrocław is the historical capital of Silesia and Lower Silesia. Today, it is the capital of the Lower Silesian Voivodeship. At various times in history, it has been part of the Kingdom of Poland, Bohemia, Hungary, the Austrian Empire, Prussia, and Germany. It became part of Poland in 1945, as a result of the border changes after the Second World War. The population of Wrocław in 2014 was 634,487, making it the fourth-largest city in Poland.
Wrocław classified as a global city by GaWC, with the ranking of high sufficiency and living standard. It was among 230 cities in the world in the ranking of the consulting company Mercer - "Best City to Live" in 2015 and the only Polish city in this ranking has been recognized as a city growing at the business center.
In 2016, the city will be the European Capital of Culture and the World Book Capital. Also, Wrocław will host the Theatre Olympics, World Bridge Games and the European Film Awards in 2016, IFLA Annual Conference and World Games in 2017
Źródło: https://en.wikipedia.org/wiki/Wroc%C5%82aw
In that mountainous places in Poland worth a trip?
Admittedly, the geographical Polish made that this is really a very attractive tourist destination. In the case of mountain ranges we can observe here a lot of very different elevations. This is undoubtedly a huge asset. Certainly one of the most visited mountain ranges in Poland is the Tatras. The highest mountains in Poland tempt us not only amazing views, but above all unique nature. Also worth a visit in the Bieszczady Mountains and the Owl. In Poland, we find many other mountain ranges, all of which are worthy of attention, for example, the Holy Cross Mountains and Table Mountains. Fans of high-altitude trips are therefore in Poland many possibilities for your vacation.