Bergamo's historic centre, known as Città Alta, is a captivating blend of history and beauty, encircled by the majestic Venetian Walls, a UNESCO World Heritage Site. These walls, constructed over three decades in the 16th century, stretch over 5 km and stand up to 50 meters high at certain points, originally serving as a defense against potential Milanese attacks. Today, visitors can explore the charming cobblestone streets, admire the medieval architecture, and enjoy panoramic views of the surrounding plains and the Alps, making Bergamo a treasured gem in Italy's rich cultural landscape.