My pick
My tip“Book your ticket from the official website weeks in advance; the morning visit is more beautiful for the light; allow two hours.”
The masterpiece of architect Antoni Gaudí and Spain's most famous landmark. Construction began in 1882 and is still being completed; its carved facades, forest of columns and stained glass turn its interior into a canvas of light unlike anywhere else.
Address
Carrer de Mallorca, 401, Eixample