Antoni Gaudí's architectural masterpieces are a defining feature of Barcelona's landscape. His unique approach, combining Gothic and Art Nouveau forms, has left a lasting legacy on the city's architecture. Among his most famous works are the Sagrada Família, a grand basilica with an expected completion in 2026, and Casa Milà, known for its undulating stone facade and twisting iron balconies. Gaudí's works are not only artistic marvels but also showcase innovative structural solutions, making them a must-see for anyone visiting Barcelona.