Near Sagrada Familia and all along Avinguda Gaudi you come across beautiful modernist lamps like the one in this picture. Well this is only a detail of the wonderful design of the ironwork. Check the modernist lamp at Gaudi Avenue on my Google Maps. Finding here in full view in this other post:
Lamp post by Falques, Avinguda Gaudi, Barcelona
Lamp post by Falques, Avinguda Gaudi, Barcelona
Look at this other beautiful street lamp near Arc de Triomf by Pere Falques.