The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

The grotto where Saint Ignatius of Loyola lived as a hermit for nearly a year.

A science fiction-inspired apartment building designed by a famous Spanish architect.

Mountain where Jesus was first tempted by the Devil.

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

A stately palace has been converted into the world's largest cannabis museum.

This cafe offers a curated collection of treats and tipples made by monks and nuns.