From Aleteia:

Pope Leo spent a sunny morning in Madrid with some 1.2 million people, first celebrating Mass at a massive outdoor altar in the city’s main plaza, and then carrying the Eucharist through the streets in a long procession on this feast of Corpus Christi.
This feast day is always celebrated on a wide scale in Spain, and the flower carpets lining the street for the Eucharist to pass are just one sign of a city that celebrates the Blessed Sacrament. After Saturday evening’s emotional vigil and long moments of Adoration, today’s procession places Pope Leo’s Spain visit in a decidedly Eucharistic mode.