Start at Santa Maria del Mar (07:00, before crowds) to absorb the soaring Gothic interior in silence. Spend mid-morning in the Picasso Museum tracing his early Barcelona years. Lunch at a hidden tapas counter on Carrer de l'Argenteria, then drift through gallery-lined streets toward the Born Cultural Centre's industrial-chic shell. End with vermouth at a corner bar watching locals play chess.

Start morning at Plaça del Sol with coffee at a corner cafe, then wander Carrer de Verdi's indie bookshops and vintage stores. Lunch at a neighborhood bodega near Mercat de la Virreina. Afternoon: explore Casa Vicens (Gaudí's first house) or climb to Park Güell's free zones. Evening: aperitif in Plaça de la Virreina watching street musicians and locals at play.

Start at Sagrada Família (book 7am slot to avoid queues), grab coffee at Flax & Kale on Còrsega, spend mid-morning exploring modernist apartment blocks on Passeig de Gràcia. Lunch at a neighbourhood mercat café, afternoon at Casa de les Punxes or MUHBA Plaça Reial's Roman ruins, evening vermouth and tapas at a corner bar on Passeig de Sant Joan.

Start at Museu d'Història de Barcelona exploring Roman ruins, then walk the labyrinthine carrer de Montcada-style streets toward the waterfront. Lunch at a beachfront chiringuito, then explore the 18th-century warehouse district and Maremagnum mall for its maritime design. End with sunset drinks at a vermouth bar near Pça Reial.

Morning at Mercat de Sarria, coffee at a local cafe, medieval street walk, lunch at La Pepita, afternoon FGC to Tibidabo or Pedralbes Monastery.

Start at MACBA's front steps at 10am watching skaters and street performers, then walk through the Gothic Quarter via Carrer del Bisbe. Lunch at a hidden mercat bar, spend afternoons in the Museu d'História de Barcelona or wandering galleries around Carrer de Joaquín Costa. End at a vermouth bar on Carrer de Sant Antoni watching locals play cards.