Did you know that Prague Castle snagged itself a Guinness World Record title? Yep, it's recognized as the oldest ancient castle complex still in use. It has been around since the 9th century, hosting Bohemian kings, Roman Emperors, and Czech presidents. Spread across more than 70,000 square meters, the castle is practically a city boasting churches, palaces, gardens, and more. You can't miss the iconic St. Vitus Cathedral with its soaring spires or the charming Golden Lane, showcasing centuries of Czech heritage.