- site. Ogof Dydd Bryaf - Cave of the Shortest Day
- date. currently suspended
- location. entrance inside Minera Quarry
- activities. re-surveying, conservation and recording
- access. locked gated entrance; access is managed by NWCC on a leader system due to the sensitivity of the site, but is temporarily suspended whilst a new licence is agreed with North Wales Wildlife Trust
- background. the first major cave found in North Wales in 1964 by Wrexham cavers, ODB remains a jewel in the crown for North Wales caves, and now forms the gateway to Ogof Llyn Ddu 2 and 3, and on towards Ogof Llyn Parc, totalling over 8km of surveyed passage
