More than 100 runners turned up for a 26.2-mile run through Shepton Mallet prison in Somerset, England last month. Athletes dressed in a variety of costumes, including striped ‘chain gang’-style jail uniforms, as they completed 78 laps of a course laid out throughout the prison, which is no longer used to house prisoners.

Shepton Mallet prison was closed in 2013, but had previously been in use since the early 1600s. Since its closure, it has been a popular tourist destination not just for runners, but for other large private events and guided ghost tours.