Sliabh Beagh is a broad, quiet upland of blanket bog and low hills on the Monaghan-Fermanagh border. It is not dramatic in a postcard way, but it gives Monaghan a wild, open landscape that contrasts strongly with the county town.
Come for walking, birdlife, and the sense of space rather than facilities. Weather changes quickly on the bog, so carry layers and stick to marked routes unless you know the ground.