Prague Castle is a palatial complex built over different periods, which houses several palaces, churches, cathedrals, squares and convent. The ideal and go in the morning and spend all or almost all day. It is accessed without cost, but visiting inside palaces, towers or churches requires one or more tickets. You can climb the bell tower of the cathedral and see the clock mechanism (interesting). I would highlight the alley of gold, without a doubt the most original place inside the castle.