Top Sights to See Regensburg Cathedral (St. Peter's Cathedral): A magnificent example of Gothic architecture, famous for its stained glass and the home of the Regensburger Domspatzen (Cathedral Sparrows) boys' choir. Stone Bridge (Steinerne Brücke): A masterpiece of medieval engineering, built in the 12th century. It offers fantastic views of the Old Town and the Danube River. Old Town Hall (Altes Rathaus): A complex of buildings with a Gothic tower, featuring the Imperial Diet Museum, where the Perpetual Diet of Regensburg met for 150 years.

Pilsner Urquell Brewery (Plzeňský Prazdroj): This is the city's main attraction. Visitors can take a tour to see the original brewing process, learn about the history of the world-famous beer, and sample unfiltered and unpasteurized Pilsner Urquell in the historic cellars. St. Bartholomew's Cathedral (Katedrála sv. Bartoloměje): Located in the main square, its spire is the tallest in the Czech Republic (102.3 meters). Climbing the tower offers a spectacular panoramic view of the city and surrounding areas. Republic Square (náměstí Republiky): This is the historic heart of Pilsen, dominated by the Cathedral and lined with beautifully preserved Baroque and Renaissance houses. Great Synagogue (Velká synagoga): The second-largest synagogue in Europe and the third-largest in the world. Its Moorish-Romanesque architecture is impressive, and it serves as a concert hall and exhibition space today.

Karlštejn is one of the most famous and most visited castles in the Czech Republic. It is a stunning, high-Gothic castle founded in 1348 by the Holy Roman Emperor and King of Bohemia, Charles IV.