Wawel Castle has been a seat of Polish kings until 15th century, when the capitol of the country was moved to Warsaw. Castle has survived World War II in very good shape, today it is a site of museum and gallery showcasing royal artifacts and way of life, along with collection of weapons and art.
To get to the castle, follow Grodzka street from Old Town Square for about 1/2 mile. The Grodzka street dead ends on castle walls. There are two entrance gates, one on each side of the castle. Main entrance is on the left side from this point. The admission to the castle grounds is free, to tour the castle rooms, armory and cathedral, look for the ticket office just inside castle courtyard.
Just to the south of the castle, in the escarpment leading down to the river, there is a cave which can be accessed down the stairs starting at the top of castle walls. According to the legend, this is where during middle ages local dragon with taste for virgins lived. Dragon ate virgins regularly, until clever shoemaker put an end to it by feeding dragon sheep stuffed with glass, nails and pepper. Today only metal statue of dragon remains, still spewing the fire from its mouth.
Visit official Wawel Castle site for current exhibit information, prices and hours of admission.
Inside of the Wawel castle grounds is the Wawel Cathedral, with rich interior decor, bell tower with great view of Krakow, and catacomb graves of famous Poles. Make sure to see the great bell called Sigmund inside church tower. Cathedral is still under the auspices of Polish Church, visit their Katedra Wawelska website for hours and more information.