Bielsko-Biała [ˈbʲɛlskɔ ˈbʲawa] (Czech: Bílsko-Bělá; German: Bielitz-Biala) is a city in Southern Poland with the population of approx. 174,000 (December 2013). The city is a centre of the approx. 325,000 large Bielsko Urban Agglomeration and is a major industrial (particularly automotive), transport and touristic hub. Neighbouring the Beskid Mountains to the south, Bielsko-Biała is composed of two former cities on opposite banks of the Biała River, Silesian Bielsko and Lesser Poland's Biała, merged in 1951. Wikipedia
Home to pretty treasures, Bielsko-biala is Poland's best kept secret. A gripping city on its own right, Krakow also deserves a visit. Attractions in Krakow include Main Market Square, Wawel Royal Castle, St Marys Basilica. Also, to reach Bielsko-biala, you'll have to take a flight to Krakow; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. Popular vacation packages of Bielsko-biala are of 1-2 days.
Yes,it is that simple really! Enjoy your trip! Keep travelling!