evidence: The Belfast Interface Project, which works to develop "creative approaches towards the regeneration" of the city's interface areas, has produced an interactive map of Belfast showing all the peace walls in the city. The map shows the sheer range of fences - some are buffers and fences, some gates with vehicle access, some solid walls and others are walls with fences above them to increase their height. [...] Recent years have seen progress but also setbacks in the journey to convince people the barriers can go. Gates in the walls to allow easier access typically close overnight or on Sundays. In 2011, a gate at Belfast's Alexandra Park — Europe's only public park bisected by a wall, which was built in 1994 to stop the open space being used for sectarian clashes — opened for the first time, though only for a few hours a day. In the same year, a gate that divided access between the Shankill and Falls Road communities started opening on Sundays.