a botanical garden
Located on Montjuïc hill, the city's botanical gardens are surrounded by the olympic village. Covering 14 hectares, they contains over 4,000 species of plants from five regions of the world including the Mediterranean, California, central Chile, South Africa and Australia. At €3,50 per person, it's fairly good value for money and makes for a great afternoon out - what's more - kids go free. The only downside is that there isn't much shade, so you may not want to go on a very hot day.
The Barcelona Botanic Garden is a botanist's wet dream. I was expecting a lush garden type setting like the Huntington Garden in San Marino, CA or the large parks found in Melbourne, AU. Instead, I encountered an array of plants planted into 14 hectares of sloping terrain. It happens to be the city's largest green space but I daresay, it's not one of the prettiest. Maybe because after trekking to the Mount Montjuic castle, my feet were less than thrilled to be hiking around a botanical garden with minimal shade. Instead of walking like we did, try taking the bus up. The nice thing is that you have a great view of the 1992 Olympic stadium in the distance as well as the National Art museum. Admission is €3,50 for adults. Free the last Sunday of each month or every Sunday after 3pm. Free with the Barcelona card.