The U-Bahn Berlin is a rapid transit system that serves the city of Berlin, Germany. It consists of 10 lines and over 170 stations, making it one of the largest and most efficient subway systems in the world. The U-Bahn operates daily, providing a reliable means of transportation for both residents and tourists. Opened in 1902, the U-Bahn has a rich history and has undergone numerous expansions and upgrades. It connects various neighborhoods and key attractions, including Brandenburg Gate and Alexanderplatz. The system is known for its punctuality and cleanliness, making it a popular choice for commuting in the bustling city.