I don’t like any kind of hospital. But I strongly suggest you visit Hospital de la Santa Creu i Sant Pau (Hospital Sant Pau in short) when you travel to Barcelona.
It’s the oldest hospital in Spain. And the only hospital in this world which was declared as World Heritage by UNESCO for its singular architectural and artistic beauty.

Even among all cities of this world, The quality and quantity of Passeig de Gracia’s modernist buildings is unrivalled. Let’s go for a walk.

Passeig de Gracia avenue belongs to the classes.
It’s the city’s elegant shopping area. You can find almost all the world’s topest fashion brands here. It’s one of the best places to view Catalonia modernist architecture too.You can see the Eixample feature of 19th century here.