After breakfast this morning, you’ll head out on a leader-led walking tour of Barcelona. See some of the city's main sights, including a visit to Antonio Gaudi's incredible La Sagrada Familia Cathedral. The architect worked on this hugely ambitious project for decades until his death, and it remains in constant construction. Along with the Camp Nou football stadium, it’s possibly the city's most iconic landmark. Gaudi was the master of the unique Catalan Modernista architecture that Barcelona is known for, and his work is dotted all over the city. Maybe check out the Neo-Gothic mansion of Guell Palace, or the wave-inspired structure of Casa Batlo this afternoon. For more insight into the artist himself, head to the Gaudi House Museum inside Parc Guell, home to a long, mosaic-covered bench overlooking the city. Tonight, maybe finish the day with a sip of red wine from a porro – a traditional glass pitcher.