Sagrada Família
Gaudí's still-unfinished basilica — begun in 1882 and still under construction — is Barcelona's defining sight and one of the most original buildings on earth.
Park Güell
Gaudí's fantastical public park — mosaic lizards, wave-shaped benches and a hilltop terrace with the city's best free-standing view over Barcelona.
Santa Maria del Mar
A soaring, austere Catalan Gothic basilica built by the working people of El Born in just 59 years — widely considered the purest Gothic church in Barcelona.
Gothic Quarter (Barri Gòtic)
Barcelona's medieval old town — a dense maze of narrow stone streets, Roman remains and hidden squares wedged between La Rambla and the harbour.
Hospital de Sant Pau (Recinte Modernista)
A working hospital until 2009, rebuilt as one of the world's largest Art Nouveau complexes — 27 pavilions of tiled domes and mosaics designed so patients would heal amid beauty rather than institutional grimness.
Palau de la Música Catalana
An almost impossibly ornate concert hall wedged into a narrow medieval street — a stained-glass skylight, sculpted muses and one of the most photographed interiors in Barcelona.
Bunkers del Carmel
Free 360-degree views over Barcelona from a hilltop Civil War anti-aircraft battery, and the city's favourite spot for a beer at sunset.
Biblioteca Pública Arús
A quirky 1895 public library founded by a freemason and playwright, specialising in freemasonry, anarchism and — genuinely — one of Europe's best Sherlock Holmes collections.
Casa Batlló
Gaudí's most theatrical facelift of an existing building — a bone-and-scale facade nicknamed the "House of Bones" or "Dragon House," with an interior built almost without straight lines.
La Pedrera (Casa Milà)
Gaudí's last civil work — a rippling stone apartment building with no straight structural walls, topped by a rooftop of surreal, armour-like chimneys.
Palau Güell
A dark, dense early Gaudí mansion just off La Rambla, built for his lifelong patron Eusebi Güell — with a rooftop forest of tiled chimneys that preview everything he'd do later.
Barcelona Cathedral
The Gothic Quarter's towering Gothic cathedral, home to 13 white geese in its cloister and free evening entry outside the tourist-visit hours.
Ciutadella Park
A former military fortress turned Barcelona's grandest public park — a monumental fountain co-designed by a young Gaudí, a zoo, a lake and the Catalan Parliament building.
Biblioteca de Catalunya
Catalonia's national library, housed inside a 15th-century Gothic former hospital — one of the most atmospheric library reading rooms in Spain.
Ateneu Barcelonès
A private cultural society since 1860, housed in a neoclassical palace with one of Barcelona's most beautiful private libraries — open to the public via guided tours.
Casa Vicens
Gaudí's very first major commission — a Moorish-influenced, ceramic-tiled summer house in Gràcia, less visited than his later work but arguably more surprising.
Arc de Triomf
A grand red-brick Neo-Mudéjar arch built as the ceremonial entrance to the 1888 Barcelona World Fair — free to view, at the head of a wide tree-lined promenade.
Montjuïc Castle
An 18th-century hilltop fortress with a dark political history as a prison and execution site, now a museum and free public viewpoint over the harbour.
Barcelona History Museum (MUHBA, Plaça del Rei)
Walk beneath medieval Barcelona directly onto the Roman streets and workshops of Barcino, preserved intact under a 14th-century royal square.
Barceloneta Beach
Barcelona's most central city beach — built from scratch for the 1992 Olympics on a former industrial waterfront, now backed by a lively fishing-quarter neighbourhood.
Columbus Monument (Mirador de Colom)
A 60-metre column at the harbour end of La Rambla, topped by a statue of Columbus and an elevator-accessed viewing platform over the port.
Las Ramblas
Barcelona's famous 1.2km pedestrian boulevard linking Plaça Catalunya to the harbour — genuinely essential to walk once, best enjoyed without high expectations of an authentic local experience today.