Possibly you’re not visiting Barcelona to discover the native habitats of Australia, Chile, the Canary Islands, or South Africa, but the Jardí Botànic de Barcelona does it for you in some style. There is a theme that may not be immediately obvious: all these locations have a ‘Mediterranean-type climate’.
You do get to explore some vegetation native to the Mediterranean, however, and helpful signage along the way means you may learn something in the process.
Views over the Olympic buildings are a bonus.
Entry is a reasonable €3.50, though the first Sunday of the month and Sundays after 3:00pm entry is free.