The driver dropped off the suitcase on Saturday at a police station in Barcelona's Eixample neighbourhood, home to Guadi's famed Sagrada Familia church, after he realised it had been left behind, a police spokeswoman said.
"Police opened the suitcase to try to find information that could identify its owner. Inside they found 10,000 euros in cash, baby clothes and a Canadian passport," she added.
Using the passport police were able to track down the owner and return the suitcase. "He was really grateful and sent us a thank you note for returning it so quickly," the spokeswoman said.