Cavan is one of three border counties in the Republic of Ireland located in the Province of Ulster; the other two are Monaghan and Donegal. The remaining six northern counties of Ulster are part of Northern Ireland. Known as the Lake County, Cavan has interesting land formations such as the limestone Burren Geopark and the Marble Arch Caves. Cavan also has many megalithic sites, ring forts, and holy wells.
I was only able to visit three thin places in Cavan: The Shannon Pot, the Cavan Burren Geopark, and St. Patrick’s Well in Holywell (technically in County Fermanagh). You can read more about these locations here: Forests, Beaches, and Holy Wells Along the Wild Atlantic Way.