Unfortunately, Opole's castle (Zamek) did not survive years of conquest and several wars, and it is no longer open to the public. One of the castle's walls, Piast Tower, or Wiea Piastowska as it is called locally, did survive. It is a sight not to be overlooked, as it has been carefully preserved and converted into a museum. You can take a tour inside for 6 zlotych (local currency) and enjoy some spectacular views of the capital.

The market square (Rynek) in Opole is a beautiful, well-preserved place. Many pubs, cafés, and restaurants surround it. It's a perfect place to enjoy some delectable Polish food when the sun sets during the summer months, with a wide variety of pierogi, bigos, and golabki. Biesiada Opolska (just north of the square) and Pub Maska are two restaurants to visit (on the square).

Opole has a few islands, the rest of which are situated on the Oder River. Wyspa Bolko and Wyspa Pasieka are the two largest islands. These islands are home to some of Opole's finest hotels. The islands hold annual events, and there are fine bistros and bars where you can drink a new cappuccino while seeing the world go by. If you like city views, go to one of the venues farther out from the city; the views get better when you get farther away.

Warszawa (Warsaw):

It is the capital of Poland with an estimated population of 1.7 million people. The majority of Polish people migrate to the city for business and education. This is due to the higher education institutions with a vibrant spirit, and it is an important center for culture and sciences. 

After the city was destroyed entirely by World War II, it gained steady progress with years of communism. This helped the city recover in terms of its architecture and commercial structure, both of which are signified by the Palace of Science and Culture and the skyscrapers. 

Kraków (Cracow):

The city has stunning architecture and fine works of art which is a major tourist attraction. It was the ruling place of the royal family and the capital of Poland until 1596. 

As the first university of Poland, the Jagiellonian University, founded in 1364, is located in Kraków and is regarded as the cradle of Polish science. Kraków has more than 730,000 residents, and it is an important cultural and academic center. 

Wrocław:          

It is the fourth largest city in Poland and the capital of Lower Silesia (Dolny Śląsk). There is a beautiful Old Town with a unique atmosphere that describes its history and location. It spreads across several islands and is surrounded by the Oder River and its tributaries on all sides. 

Gdańsk:

It is a major seaport in Poland and forms the Tricity Metropolis with Sopot and Gdynia along with a population of 750,000 people. Gdansk was an important Hanseatic city, owned by Poland and Germany alternately. This where World War II and the Polish Solidarity Movement began. 

Poznań:

It is among the oldest and largest Polish cities, and due to its Paris-Moscow route, Poznań is an important transport and trade center. Poznań has been the venue for the International Trade Fair since 1925. It also has a good number of universities and research institutes that contribute to its development. 

Łódź:

Łódź is an important city in Poland, and it was the textile-manufacturing hub. It has a Central Museum of Textiles with 19th-century machinery, fabrics, and handicrafts that were once a prominent part of the city’s trade and commerce. The Manufaktura complex, which was once a factory, was restored into a lively arts and culture center. 

Poland has numerous cities and universities that can make your time there worthwhile. Moreover, the value of a degree acquired from any university in this country is far greater than in other European regions.