County Monaghan: See
County Museum in Monaghan is a good introduction to the area's natural and human history.
Literary history: the best known local bard was Patrick Kavanagh. The centre at Iniskeen near Carrickmacross depicts his life and works.
Churches range from early Christian and Norman foundations (as at Clones) to modern places. The end of the Penal Laws against Catholics saw a 19th century wave of church-building, such as St Joseph's in Carrickmacross, with its fine stained-glass windows.
Drumlins: the county is covered in these hillocks of gravel and rubble left behind by glaciers. They stretch in a broad belt from Clew Bay in County Mayo to Strangford Lough in County Down, and where they're flooded by sea or lake they form a scattering of islets. On land as in this county they form a "basket of eggs" rolling countryside.
Ulster Canal courses east-west across the county, from the upper River Bann in County Tyrone through Monaghan and Clones to River Finn and Upper Lough Erne in County Cavan. It's long disused and much of it is little more than an overgrown gully, with no footpath. It was built 1825-1842 and was 74 km long, but only 12 ft (3.7 m) wide so most freight barges couldn't use it. It lost money hand-over-fist and closed in 1931. In the 2020s it's being restored, essentially a new construction to make it wide enough for leisure craft. It's now open for navigation from Lough Erne to Castle Saunderson in County Cavan, and a short detached section between Clones and Clonfad. There's no timescale for completing the rest.