4. Visit the Prague Castle
Built around 870 AD, Prague Castle dominates the skyline of the city. Once the seat of the old Czech kings. You can explore the castle gardens and much of the terrain is free. Vitus Cathedral is the most famous building of the Prague Castle.
Where you can also see the graves and remains of some of the most notorious saints and rulers in Czech history. Records indicate that Prague Castle is the largest castle area in the world. From the 10th century, the Prague Castle served as the seat of the Czech princes and later kings and seat of the Prague bishop.