Plaza de Callao is a bustling square located in the heart of Madrid, Spain. It serves as a major commercial and cultural hub, surrounded by shops, theaters, and restaurants. The square is known for its iconic buildings, including the famous Edificio Carrión, which features a large neon sign. The plaza is a popular meeting point for both locals and tourists, often hosting events and celebrations. It connects several important streets, making it a key transit area in the city. Visitors can enjoy the vibrant atmosphere and explore nearby attractions, such as the Gran Vía and Plaza de España.