3Milan Cathedral (Duomo di Milano, Italy)

The Milan Cathedral, or Duomo di Milano, is one of the most impressive Gothic cathedrals in the world. Construction began in 1386, and its intricate details, from the thousands of marble statues and spires to the stunning stained-glass windows, make it a masterpiece of Gothic architecture. The cathedral’s white marble façade, adorned with carvings and statues, is a testament to centuries of craftsmanship. Visitors can climb to the rooftop terraces, where they can walk among the spires and enjoy panoramic views of Milan. The sheer scale and detail of the Duomo, combined with its ethereal beauty, make it one of the most extraordinary buildings in the world.