Barcelona architecture, Casa Batlló, Antoni Gaudí, colorful mosaic, undulating roof, twisting columns, irregular windows, curved façade, modernist style, Spanish Gothic, intricate carvings, ornate details, Sagrada Família, Park Güell, Mediterranean sea, warm sunlight, bright blue sky, palm trees, balconies with ironwork, ornamental chimneys, ceramic tiles, stucco walls, Gothic Quarter, narrow streets, historic buildings, urban landscape, daytime, soft shadows, high contrast.