This murky image was taken at Uaimh na gCait (often bastardised into English as Oweynagat) located at Cruachain in Roscommon and its one of the more famous ancient ‘crossing points’ to the Otherworld – a list predominantly derived from literary (i.e. not historical) sources. The site is definitely worth a visit as long as you also visit the nearby Rathcroghan Visitor Centre, and you’re nimble enough to get through the narrow entrance and clamber down into the main cavern.
Over the last forty years or so however, it’s worth noting the development of misinformed fantasy-style narratives around the site and its function (e.g. the Entrance to Hell, the home of the Morrigan, dun-dun-dun!). As a result, you have to take most of the online references with liberal doses of salt.
This pattern of what we generically call ‘Tourism Mythology’ is one that we’re seeing increasingly across the country and its probably something you should keep an eye out for if you’re interested in authentic Irish culture.
I’ll probably be covering the issue in Vóg (the Irish Imbas newsletter) at some point in the near future.