Welcome to the heart and soul of Prague Castle, the magnificent St. Vitus Cathedral. You can feel the centuries of history as you step inside this breathtaking Gothic masterpiece, a project that took nearly 600 years to complete. While you can peek into the main nave for free, I highly recommend getting a ticket to explore the stunning chapels, admire the famous Art Nouveau stained glass by Alfons Mucha, and see the silver tomb of St. John of Nepomuk. It's a truly awe-inspiring space, and the resting place of Czech kings and patron saints, making it a cornerstone of our nation's history.