In Spain, San Juan's day eve means a lot of bonfires.
The holiday is celebrated throughout the country. But the most popular celebrations take place in Alicante, Galicia and Catalonia, where people gather together to throw unwanted wooden objects and dolls (traditionally representing Judas Iscariot but nowadays, usually infamous national figures) into bonfires. According to tradition, if one jumps over the bonfire three times, their souls are cleansed.
Participants traditionally wash their faces and feet in the ocean three times after midnight in order to be granted three wishes and a happy ensuing twelve months.
Preparation for the holiday begins on June 19, and culminates with fireworks after midnight on the 24th. Below, via Reuters, scenes from Spain: