The Barcelona Revetlla
The Revetlla de Sant Joan, held on 23 June, is one of the most traditional festivals in the Països Catalans [Catalan Countries]. The main features of these celebrations are bonfires, music, dancing and coca tarts. A lot of Barcelona organisations hold revetlla celebrations in the city’s streets and squares, with orchestras, dancing and, in some cases, bonfires.

More information here: http://lameva.barcelona.cat/culturapopular/en/festivals-and-traditions/nit-de-sant-joan?platform=hootsuite